BM_GETCHECK message

Gets the check state of a radio button or check box. You can send this message explicitly or use the Button_GetCheck macro.

Parameters

wParam

Not used; must be zero.

lParam

Not used; must be zero.

Return value

The return value from a button created with the BS_AUTOCHECKBOX, BS_AUTORADIOBUTTON, BS_AUTO3STATE, BS_CHECKBOX, BS_RADIOBUTTON, or BS_3STATE style can be one of the following.

Return code Description
BST_CHECKED
Button is checked.
BST_INDETERMINATE
Button is grayed, indicating an indeterminate state (applies only if the button has the BS_3STATE or BS_AUTO3STATE style).
BST_UNCHECKED
Button is cleared

Remarks

If the button has a style other than those listed, the return value is zero.

Requirements

Minimum supported client
Windows Vista [desktop apps only]
Minimum supported server
Windows Server 2003 [desktop apps only]
Header
Winuser.h (include Windows.h)

See also

Reference

BM_GETSTATE

BM_SETCHECK