An application sends a WM_CLEAR message to an edit control or combo box to delete (clear) the current selection, if any, from the edit control.
WM_CLEAR wParam = 0; // not used; must be zero lParam = 0; // not used; must be zero
This message has no parameters.
This message does not return a value.
The deletion performed by the WM_CLEAR message can be undone by sending the edit control an EM_UNDO message.
To delete the current selection and place the deleted content on the clipboard, use the WM_CUT message.
When sent to a combo box, the WM_CLEAR message is handled by its edit control. This message has no effect when sent to a combo box with the CBS_DROPDOWNLIST style.
EM_UNDO, WM_COPY, WM_CUT, WM_PASTE
file: /Techref/os/win/api/win32/mess/src/msg22_15.htm, 1KB, , updated: 2000/4/7 12:20, local time: 2024/9/1 14:46,
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