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This function creates a new shape for the system caret and assigns ownership of the caret to the specified window. The caret shape can be a line or a block.
BOOL CreateCaret( HWND hWnd , HBITMAP hBitmap , int nWidth , int nHeight );
Parameters
Return Values
Nonzero indicates success. Zero indicates failure. To get extended error information, call GetLastError.
Remarks
The nWidthand nHeightparameters specify the caret's width and height, in logical units; the exact width and height, in pixels, depend on the window's mapping mode.
CreateCaretautomatically destroys the previous caret shape, if any, regardless of the window that owns the caret. The caret is hidden until the application calls the ShowCaretfunction to make the caret visible.
The system provides one caret per queue. A window should create a caret only when it has the keyboard focus or is active. The window should destroy the caret before losing the keyboard focus or becoming inactive.
You can retrieve the width or height of the system's window border by using the ShowCaretfunction, specifying the SM_CXBORDER and SM_CYBORDER values. Using the window border width or height guarantees that the caret will be visible on a high-resolution screen.
Requirements
Runs On | Versions | Defined in | Include | Link to |
---|---|---|---|---|
Windows CE OS | 1.0 and later | Winuser.h | Caret.lib |
Note This API is part of the complete Windows CE OS package as provided by Microsoft. The functionality of a particular platform is determined by the original equipment manufacturer (OEM) and some devices may not support this API.
See Also
CreateBitmap, DestroyCaret, GetSystemMetrics, HideCaret, LoadBitmap, ShowCaret