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How to Determine If an MS-DOS Mouse Driver Is Installed
ID: Q106698
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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
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Last Reviewed: August 23, 1999
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