Microsoft KB Archive/106698

How to Determine If an MS-DOS Mouse Driver Is Installed ID: Q106698 The information in this article applies to: Microsoft FoxPro for MS-DOS, versions 2.0, 2.5, 2.5a, 2.5b To determine if a user has an MS-DOS mouse driver installed, you can use the MROW() function. The MROW() function returns a number that indicates the current row location of the mouse cursor (pointer). If MROW() returns -1, there are two possibilities. First, no mouse driver has been installed, and there is no output window. Second, the mouse cursor is positioned above or below the user-defined window. To get an accurate reading from MROW(), test the presence of the mouse prior to activating any user-defined window. For example: *** Begin Sample Code *** SET MOUSE ON RELEASE WINDOWS IF MROW()=-1 WAIT WINDOW "No MOUSE driver installed" ELSE WAIT WINDOW "Mouse driver is installed" ENDIF *** End Sample Code *** NOTE: The command SET MOUSE OFF also returns a -1. Additional query words: FoxDos ACTIVE mouse.com mouse.sys Keywords  : Version  : Platform  : Issue type  :

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