# UNREGISTERMOUSEEVENT (W*S)

QuickWin Function: Removes the callback routine registered for a specified window by an earlier call to REGISTERMOUSEEVENT.

## Module

USE IFQWIN

result = UNREGISTERMOUSEEVENT (unit,mouseevents)

unit | (Input) INTEGER(4) on IA-32 architecture; INTEGER(8) on Intel® 64 architecture. Unit number of the window whose callback routine on mouse events is to be unregistered.
mouseevents | (Input) INTEGER(4). One or more mouse events handled by the callback routine to be unregistered. Symbolic constants (defined in `IFQWIN.F90`) for the possible mouse events are: MOUSE$LBUTTONDOWN - Left mouse button down MOUSE$LBUTTONUP - Left mouse button up MOUSE$LBUTTONDBLCLK - Left mouse button double-click MOUSE$RBUTTONDOWN - Right mouse button down MOUSE$RBUTTONUP - Right mouse button up MOUSE$RBUTTONDBLCLK - Right mouse button double-click MOUSE$MOVE - Mouse moved

## Results

The result type is INTEGER(4). The result is zero or a positive integer if successful; otherwise, a negative integer that can be one of the following:

- MOUSE$BADUNIT - The unit specified is not open, or is not associated with a QuickWin window.

- MOUSE$BADEVENT - The event specified is not supported.

Once you call UNREGISTERMOUSEEVENT, QuickWin no longer calls the callback routine specified earlier for the window when mouse events occur. Calling UNREGISTERMOUSEEVENT when no callback routine is registered for the window has no effect.

Parent topic: QuickWin Library Routines

## See Also

REGISTERMOUSEEVENT
WAITONMOUSEEVENT