windowsx.h header

This header is used by multiple technologies. For more information, see:

• Developer Notes
• Windows and Messages
• Windows Controls
• Windows GDI

windowsx.h contains the following programming interfaces:

Functions

Button_Enable Enables or disables a button.
Button_GetCheck Gets the check state of a radio button or check box. You can use this macro or send the BM_GETCHECK message explicitly.
Button_GetState Retrieves the state of a button or check box. You can use this macro or send the BM_GETSTATE message explicitly.
Button_GetText Gets the text of a button.
Button_GetTextLength Gets the number of characters in the text of a button.
Button_SetCheck Sets the check state of a radio button or check box. You can use this macro or send the BM_SETCHECK message explicitly.
Button_SetState Sets the highlight state of a button. The highlight state indicates whether the button is highlighted as if the user had pushed it. You can use this macro or send the BM_SETSTATE message explicitly.
Button_SetStyle Sets the style of a button. You can use this macro or send the BM_SETSTYLE message explicitly.
Button_SetText Sets the text of a button.
ComboBox_AddItemData Adds item data to the list in a combo box at the specified location. You can use this macro or send the CB_ADDSTRING message explicitly.
ComboBox_AddString Adds a string to a list in a combo box.
ComboBox_DeleteString Deletes the item at the specified location in a list in a combo box. You can use this macro or send the CB_DELETESTRING message explicitly.
ComboBox_Dir Adds names to the list displayed by a combo box.
ComboBox_Enable Enables or disables a combo box control.
ComboBox_FindItemData Finds the first item in a combo box list that has the specified item data. You can use this macro or send the CB_FINDSTRING message explicitly.
ComboBox_FindString Finds the first string in a combo box list that begins with the specified string. You can use this macro or send the CB_FINDSTRING message explicitly.
ComboBox_FindStringExact Finds the first string in a combo box list that exactly matches the specified string, except that the search is not case sensitive. You can use this macro or send the CB_FINDSTRINGEXACT message explicitly.
ComboBox_GetCount Gets the number of items in the list box of a combo box. You can use this macro or send the CB_GETCOUNT message explicitly.
ComboBox_GetCurSel Gets the index of the currently selected item in a combo box. You can use this macro or send the CB_GETCURSEL message explicitly.
ComboBox_GetDroppedControlRect Retrieves the screen coordinates of a combo box in its dropped-down state. You can use this macro or send the CB_GETDROPPEDCONTROLRECT message explicitly.
ComboBox_GetDroppedState Ascertains whether the drop list in a combo box control is visible. You can use this macro or send the CB_GETDROPPEDSTATE message explicitly.
ComboBox_GetExtendedUI Ascertains whether a combo box is using the default user interface (UI) or the extended UI. You can use this macro or send the CB_GETEXTENDEDUI message explicitly.
ComboBox_GetItemData Gets the application-defined value associated with the specified list item in a combo box. You can use this macro or send the CB_GETITEMDATA message explicitly.
ComboBox_GetItemHeight Retrieves the height of list items in a combo box. You can use this macro or send the CB_GETITEMHEIGHT message explicitly.
ComboBox_GetLBText Gets a string from a list in a combo box. You can use this macro or send the CB_GETLBTEXT message explicitly.
ComboBox_GetLBTextLen Gets the length of a string in the list in a combo box. You can use this macro or send the CB_GETLBTEXTLEN message explicitly.
ComboBox_GetText Retrieves the text from a combo box control.
ComboBox_GetTextLength Gets the number of characters in the text of a combo box.
ComboBox_InsertItemData Inserts item data in a list in a combo box at the specified location. You can use this macro or send the CB_INSERTSTRING message explicitly.
ComboBox_InsertString Adds a string to a list in a combo box at the specified location. You can use this macro or send the CB_INSERTSTRING message explicitly.
ComboBox_LimitText Limits the length of the text the user may type into the edit control of a combo box. You can use this macro or send the CB_LIMITTEXT message explicitly.
ComboBox_ResetContent Removes all items from the list box and edit control of a combo box. You can use this macro or send the CB_RESETCONTENT message explicitly.
ComboBox_SelectItemData Searches a list in a combo box for an item that has the specified item data. If a matching item is found, the item is selected. You can use this macro or send the CB_SELECTSTRING message explicitly.
ComboBox_SelectString Searches a list in a combo box for an item that begins with the characters in a specified string. If a matching item is found, the item is selected. You can use this macro or send the CB_SELECTSTRING message explicitly.
ComboBox_SetCurSel Sets the currently selected item in a combo box. You can use this macro or send the CB_SETCURSEL message explicitly.
ComboBox_SetExtendedUI Selects either the default user interface (UI) or the extended UI for a combo box that has the CBS_DROPDOWN or CBS_DROPDOWNLIST style. You can use this macro or send the CB_SETEXTENDEDUI message explicitly.
ComboBox_SetItemData Sets the application-defined value associated with the specified list item in a combo box. You can use this macro or send the CB_SETITEMDATA message explicitly.
ComboBox_SetItemHeight Sets the height of list items or the selection field in a combo box. You can use this macro or send the CB_SETITEMHEIGHT message explicitly.
ComboBox_SetText Sets the text of a combo box.
ComboBox_ShowDropdown Shows or hides the list in a combo box. You can use this macro or send the CB_SHOWDROPDOWN message explicitly.
DeleteFont The DeleteFont macro deletes a font object, freeing all system resources associated with the font object.
Edit_CanUndo Determines whether there are any actions in the undo queue of an edit or rich edit control. You can use this macro or send the EM_CANUNDO message explicitly.
Edit_EmptyUndoBuffer Resets the undo flag of an edit or rich edit control. The undo flag is set whenever an operation within the edit control can be undone. You can use this macro or send the EM_EMPTYUNDOBUFFER message explicitly.
Edit_Enable Enables or disables an edit control.
Edit_FmtLines Sets a flag that determines whether text retrieved from a multiline edit control includes soft line-break characters.
Edit_GetFirstVisibleLine Gets the index of the uppermost visible line in a multiline edit or rich edit control. You can use this macro or send the EM_GETFIRSTVISIBLELINE message explicitly.
Edit_GetHandle Gets a handle to the memory currently allocated for the text of a multiline edit control. You can use this macro or send the EM_GETHANDLE message explicitly.
Edit_GetLine Retrieves a line of text from an edit or rich edit control. You can use this macro or send the EM_GETLINE message explicitly.
Edit_GetLineCount Gets the number of lines in the text of an edit control. You can use this macro or send the EM_GETLINECOUNT message explicitly.
Edit_GetModify Gets the state of an edit or rich edit control's modification flag. The flag indicates whether the contents of the control have been modified. You can use this macro or send the EM_GETMODIFY message explicitly.
Edit_GetPasswordChar Gets the password character for an edit or rich edit control. You can use this macro or send the EM_GETPASSWORDCHAR message explicitly.
Edit_GetRect Gets the formatting rectangle of an edit control. You can use this macro or send the EM_GETRECT message explicitly.
Edit_GetSel Gets the starting and ending character positions of the current selection in an edit or rich edit control. You can use this macro or send the EM_GETSEL message explicitly.
Edit_GetText Gets the text of an edit control.
Edit_GetTextLength Gets the number of characters in the text of an edit control.
Edit_GetWordBreakProc Retrieves the address of an edit or rich edit control's Wordwrap function. You can use this macro or send the EM_GETWORDBREAKPROC message explicitly.
Edit_LimitText Limits the length of text that can be entered into an edit control. You can use this macro or send the EM_LIMITTEXT message explicitly.
Edit_LineFromChar Gets the index of the line that contains the specified character index in a multiline edit or rich edit control. You can use this macro or send the EM_LINEFROMCHAR message explicitly.
Edit_LineIndex Gets the character index of the first character of a specified line in a multiline edit or rich edit control. You can use this macro or send the EM_LINEINDEX message explicitly.
Edit_LineLength Retrieves the length, in characters, of a line in an edit or rich edit control. You can use this macro or send the EM_LINELENGTH message explicitly.
Edit_ReplaceSel Replaces the selected text in an edit control or a rich edit control with the specified text. You can use this macro or send the EM_REPLACESEL message explicitly.
Edit_Scroll Scrolls the text vertically in a multiline edit or rich edit control. You can use this macro or send the EM_SCROLL message explicitly.
Edit_ScrollCaret Scrolls the caret into view in an edit or rich edit control. You can use this macro or send the EM_SCROLLCARET message explicitly.
Edit_SetHandle Sets the handle of the memory that will be used by a multiline edit control. You can use this macro or send the EM_SETHANDLE message explicitly.
Edit_SetModify Sets or clears the modification flag for an edit control. The modification flag indicates whether the text within the edit control has been modified. You can use this macro or send the EM_SETMODIFY message explicitly.
Edit_SetPasswordChar Sets or removes the password character for an edit or rich edit control. When a password character is set, that character is displayed in place of the characters typed by the user. You can use this macro or send the EM_SETPASSWORDCHAR message explicitly.
Edit_SetReadOnly Sets or removes the read-only style (ES_READONLY) of an edit or rich edit control. You can use this macro or send the EM_SETREADONLY message explicitly.
Edit_SetRect Sets the formatting rectangle of an edit control. You can use this macro or send the EM_SETRECT message explicitly.
Edit_SetRectNoPaint Sets the formatting rectangle of a multiline edit control. This macro is equivalent to Edit_SetRect, except that it does not redraw the edit control window. You can use this macro or send the EM_SETRECTNP message explicitly.
Edit_SetSel Selects a range of characters in an edit or rich edit control. You can use this macro or send the EM_SETSEL message explicitly.
Edit_SetTabStops Sets the tab stops in a multiline edit or rich edit control. When text is copied to the control, any tab character in the text causes space to be generated up to the next tab stop. You can use this macro or send the EM_SETTABSTOPS message explicitly.
Edit_SetText Sets the text of an edit control.
Edit_SetWordBreakProc Replaces an edit control's default Wordwrap function with an application-defined Wordwrap function. You can use this macro or send the EM_SETWORDBREAKPROC message explicitly.
Edit_Undo Undoes the last operation in the undo queue of an edit or rich edit control. You can use this macro or send the EM_UNDO message explicitly.
GET_X_LPARAM Retrieves the signed x-coordinate from the specified LPARAM value.
GET_Y_LPARAM Retrieves the signed y-coordinate from the given LPARAM value.
ListBox_AddItemData Adds item data to the list box at the specified location. You can use this macro or send the LB_ADDSTRING message explicitly.
ListBox_AddString Adds a string to a list box.
ListBox_DeleteString Deletes the item at the specified location in a list box. You can use this macro or send the LB_DELETESTRING message explicitly.
ListBox_Dir Adds names to the list displayed by a list box.
ListBox_Enable Enables or disables a list box control.
ListBox_FindItemData Finds the first item in a list box that has the specified item data. You can use this macro or send the LB_FINDSTRING message explicitly.
ListBox_FindString Finds the first string in a list box that begins with the specified string. You can use this macro or send the LB_FINDSTRING message explicitly.
ListBox_FindStringExact Finds the first list box string that exactly matches the specified string, except that the search is not case sensitive. You can use this macro or send the LB_FINDSTRINGEXACT message explicitly.
ListBox_GetCaretIndex Retrieves the index of the list box item that has the focus rectangle in a multiple-selection list box. The item may or may not be selected. You can use this macro or send the LB_GETCARETINDEX message explicitly.
ListBox_GetCount Gets the number of items in a list box. You can use this macro or send the LB_GETCOUNT message explicitly.
ListBox_GetCurSel Gets the index of the currently selected item in a single-selection list box. You can use this macro or send the LB_GETCURSEL message explicitly.
ListBox_GetHorizontalExtent Gets the width that a list box can be scrolled horizontally (the scrollable width) if the list box has a horizontal scroll bar. You can use this macro or send the LB_GETHORIZONTALEXTENT message explicitly.
ListBox_GetItemData Gets the application-defined value associated with the specified list box item. You can use this macro or send the LB_GETITEMDATA message explicitly.
ListBox_GetItemHeight Retrieves the height of items in a list box.
ListBox_GetItemRect Gets the dimensions of the rectangle that bounds a list box item as it is currently displayed in the list box. You can use this macro or send the LB_GETITEMRECT message explicitly.
ListBox_GetSel Gets the selection state of an item. You can use this macro or send the LB_GETSEL message explicitly.
ListBox_GetSelCount Gets the count of selected items in a multiple-selection list box. You can use this macro or send the LB_GETSELCOUNT message explicitly.
ListBox_GetSelItems Gets the indexes of selected items in a multiple-selection list box. You can use this macro or send the LB_GETSELITEMS message explicitly.
ListBox_GetText Gets a string from a list box. You can use this macro or send the LB_GETTEXT message explicitly.
ListBox_GetTextLen Gets the length of a string in a list box. You can use this macro or send the LB_GETTEXTLEN message explicitly.
ListBox_GetTopIndex Gets the index of the first visible item in a list box. You can use this macro or send the LB_GETTOPINDEX message explicitly.
ListBox_InsertItemData Inserts item data to a list box at the specified location. You can use this macro or send the LB_INSERTSTRING message explicitly.
ListBox_InsertString Adds a string to a list box at the specified location. You can use this macro or send the LB_INSERTSTRING message explicitly.
ListBox_ResetContent Removes all items from a list box. You can use this macro or send the LB_RESETCONTENT message explicitly.
ListBox_SelectItemData Searches a list box for an item that has the specified item data. If a matching item is found, the item is selected. You can use this macro or send the LB_SELECTSTRING message explicitly.
ListBox_SelectString Searches a list box for an item that begins with the characters in a specified string. If a matching item is found, the item is selected. You can use this macro or send the LB_SELECTSTRING message explicitly.
ListBox_SelItemRange Selects or deselects one or more consecutive items in a multiple-selection list box. You can use this macro or send the LB_SELITEMRANGE message explicitly.
ListBox_SetCaretIndex Sets the focus rectangle to the item at the specified index in a multiple-selection list box. If the item is not visible, it is scrolled into view. You can use this macro or send the LB_SETCARETINDEX message explicitly.
ListBox_SetColumnWidth Sets the width of all columns in a multiple-column list box. You can use this macro or send the LB_SETCOLUMNWIDTH message explicitly.
ListBox_SetCurSel Sets the currently selected item in a single-selection list box. You can use this macro or send the LB_SETCURSEL message explicitly.
ListBox_SetHorizontalExtent Set the width by which a list box can be scrolled horizontally (the scrollable width).
ListBox_SetItemData Sets the application-defined value associated with the specified list box item. You can use this macro or send the LB_SETITEMDATA message explicitly.
ListBox_SetItemHeight Sets the height of items in a list box.
ListBox_SetSel Selects or deselects an item in a multiple-selection list box. You can use this macro or send the LB_SETSEL message explicitly.
ListBox_SetTabStops Sets the tab-stop positions in a list box. You can use this macro or send the LB_SETTABSTOPS message explicitly.
ListBox_SetTopIndex Ensures that the specified item in a list box is visible. You can use this macro or send the LB_SETTOPINDEX message explicitly.
ScrollBar_Enable Enables or disables a scroll bar control.
ScrollBar_GetPos Retrieves the position of the scroll box (thumb) in the specified scroll bar.
ScrollBar_GetRange Gets the range of a scroll bar.
ScrollBar_SetPos Sets the position of the scroll box (thumb) in the specified scroll bar and, if requested, redraws the scroll bar to reflect the new position of the scroll box. (ScrollBar_SetPos)
ScrollBar_SetRange Sets the range of a scroll bar.
ScrollBar_Show Shows or hides a scroll bar control.
SelectFont The SelectFont macro selects a font object into the specified device context (DC). The new font object replaces the previous font object.
Static_Enable Enables or disables a static control.
Static_GetIcon Retrieves a handle to the icon associated with a static control that has the SS_ICON style. You can use this macro or send the STM_GETICON message explicitly.
Static_GetText Gets the text of a static control.
Static_GetTextLength Gets the number of characters in the text of a static control.
Static_SetIcon Sets the icon for a static control. You can use this macro or send the STM_SETICON message explicitly.
Static_SetText Sets the text of a static control.