Caret is a blinking cursor in a window. It displays the current position of the cursor where the input is getting added from user. A textbox or text area control automatically displayes caret. It is the builtin property of the windon. However a custom window application which displayes logs, terminal or console output etc can use caret. Win32 APIs are available to create, distroy, show, hide, set position etc.
CreateCaret() creates a cursor with a size of nWidth x nHeight. It creates a solid cursor if hBitmap is NULL else the bitmap is used for drawing the cursor.
BOOL WINAPI CreateCaret(HWND hWnd, HBITMAP hBitmap, int nWidth, int nHeight);
Frees the memory of cursor object and releases the handle
BOOL WINAPI DestroyCaret(void);
Returns the current blink interval time of the cursor in milliseconds. The less the number the more the blink rate.
UINT WINAPI GetCaretBlinkTime(void);
Returns the current position of the cursor.
BOOL WINAPI GetCaretPos(LPPOINT lpPoint);
Hides the cursor of the window.
BOOL WINAPI HideCaret(HWND hWnd);
Set the blink time of the caret in miliseconds. The less the time the more the blinking rate.
BOOL WINAPI SetCaretBlinkTime(UINT uMSeconds);
SetCaretPos set the caret position in the window
BOOL WINAPI SetCaretPos(int X, int Y);
ShowCaret shows the blinking caret
BOOL WINAPI ShowCaret(HWND hWnd);
Caret Demo application
Demo aplication showing Create, Destroy, Show, Hide of Caret/Cursor. With UP arrow key, caret blink time is reduced and blink rate increases. With DOWN arrow key, caret blink time is increated and blink rate reduced.
About our authors: Team EQA
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