ClipCursor function (winuser.h)

Confines the cursor to a rectangular area on the screen. If a subsequent cursor position (set by the SetCursorPos function or the mouse) lies outside the rectangle, the system automatically adjusts the position to keep the cursor inside the rectangular area.

BOOL ClipCursor(
  [in, optional] const RECT *lpRect
);

[in, optional] lpRect

Type: const RECT*

A pointer to the structure that contains the screen coordinates of the upper-left and lower-right corners of the confining rectangle. If this parameter is NULL, the cursor is free to move anywhere on the screen.

Type: BOOL

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

The cursor is a shared resource. If an application confines the cursor, it must release the cursor by using ClipCursor before relinquishing control to another application.

The calling process must have WINSTA_WRITEATTRIBUTES access to the window station.

For an example, see Confining a Cursor.

Conceptual

Cursors

GetClipCursor

GetCursorPos

Other Resources

RECT

Reference

SetCursorPos