BUG: MOUSE(0) Doesn't Reset in Reopened WINDOW If Compiled (45485)

SYMPTOMS

After closing a WINDOW, the MOUSE(0) function does not reset to 0 in the next opened WINDOW in an application compiled with Microsoft QuickBasic Version 1.00 for the Macintosh .

The MOUSE(0) function should return a 0 (zero) until the mouse button is pressed. When a WINDOW is closed and reopened, the first value returned by the MOUSE(0) function should be 0. In the QuickBasic interpreter, this is exactly how the MOUSE(0) function behaves, but in a compiled application, the first invocation of MOUSE(0) improperly returns a 1 when a closed WINDOW is reopened.

Microsoft has confirmed this to be a bug in Version 1.00. We are researching this problem and will post new information as it becomes available.

MORE INFORMATION

To work around this problem, add the statement x=MOUSE(0) to flush the first bad value immediately after the second window is defined, or use the following WHILE statement

     WHILE MOUSE(0) <> 1 : WEND

in place of the following:

     WHILE MOUSE(0) = 0 : WEND

The following code example waits for a mouse click in the "First Window", but immediately CLOSEs the "Second Window" in a compiled application without an additional click. When run in the interpreter, each WINDOW waits for a separate click.

Code Example

WINDOW 1,"First Window",(100,100)-(200,200)
   WHILE MOUSE(0)=0 : WEND
WINDOW CLOSE 1
WINDOW 2,"Second Window",(205,205)-(305,305)
' x=MOUSE(0)   ' Add this as workaround
   WHILE MOUSE(0)=0 : WEND
WINDOW CLOSE 1