TextOutA function

The TextOut function writes a character string at the specified location, using the currently selected font, background color, and text color.

Syntax

BOOL TextOutA(
  HDC    hdc,
  int    x,
  int    y,
  LPCSTR lpString,
  int    c
);

Parameters

hdc

A handle to the device context.

x

The x-coordinate, in logical coordinates, of the reference point that the system uses to align the string.

y

The y-coordinate, in logical coordinates, of the reference point that the system uses to align the string.

lpString

A pointer to the string to be drawn. The string does not need to be zero-terminated, because cchString specifies the length of the string.

c

The length of the string pointed to by lpString, in characters.

Return Value

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero.

Remarks

The interpretation of the reference point depends on the current text-alignment mode. An application can retrieve this mode by calling the GetTextAlign function; an application can alter this mode by calling the SetTextAlign function. You can use the following values for text alignment. Only one flag can be chosen from those that affect horizontal and vertical alignment. In addition, only one of the two flags that alter the current position can be chosen.

Term Description
TA_BASELINE The reference point will be on the base line of the text.
TA_BOTTOM The reference point will be on the bottom edge of the bounding rectangle.
TA_TOP The reference point will be on the top edge of the bounding rectangle.
TA_CENTER The reference point will be aligned horizontally with the center of the bounding rectangle.
TA_LEFT The reference point will be on the left edge of the bounding rectangle.
TA_RIGHT The reference point will be on the right edge of the bounding rectangle.
TA_NOUPDATECP The current position is not updated after each text output call. The reference point is passed to the text output function.
TA_RTLREADING Middle East language edition of Windows: The text is laid out in right to left reading order, as opposed to the default left to right order. This applies only when the font selected into the device context is either Hebrew or Arabic.
TA_UPDATECP The current position is updated after each text output call. The current position is used as the reference point.
 

By default, the current position is not used or updated by this function. However, an application can call the SetTextAlign function with the fMode parameter set to TA_UPDATECP to permit the system to use and update the current position each time the application calls TextOut for a specified device context. When this flag is set, the system ignores the nXStart and nYStart parameters on subsequent TextOut calls.

When the TextOut function is placed inside a path bracket, the system generates a path for the TrueType text that includes each character plus its character box. The region generated is the character box minus the text, rather than the text itself. You can obtain the region enclosed by the outline of the TrueType text by setting the background mode to transparent before placing the TextOut function in the path bracket. Following is sample code that demonstrates this procedure.


// Obtain the window's client rectangle 
GetClientRect(hwnd, &r);

// THE FIX: by setting the background mode 
// to transparent, the region is the text itself 
// SetBkMode(hdc, TRANSPARENT); 

// Bracket begin a path 
BeginPath(hdc);

// Send some text out into the world 
TCHAR text[ ] = "Defenestration can be hazardous";
TextOut(hdc,r.left,r.top,text, ARRAYSIZE(text));

// Bracket end a path 
EndPath(hdc);

// Derive a region from that path 
SelectClipPath(hdc, RGN_AND);

// This generates the same result as SelectClipPath() 
// SelectClipRgn(hdc, PathToRegion(hdc)); 

// Fill the region with grayness 
FillRect(hdc, &r, GetStockObject(GRAY_BRUSH));

Examples

For an example, see Enumerating the Installed Fonts.

Requirements

   
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header wingdi.h (include Windows.h)
Library Gdi32.lib
DLL Gdi32.dll

See Also

Font and Text Functions

Fonts and Text Overview

GetTextAlign

SelectObject

SetBkColor

SetTextAlign

SetTextColor

TabbedTextOut