They probably have code that does

Windows.State=xlNormal

You assume it is maximized, they assume it isn't.

--
Regards,
Tom Ogilvy

"JK" wrote in message news:v4Y0e.52225$hA3.41751@trnddc09...
Hopefully this is not out of the realm of this group. My application is
written for Excel (VBA), Win/Excel 97 and newer. Several customers
reported
that the window does not maximize when opening my application (Open
procedure includes Window.State=Maximized). However, on their machines we
discovered that they had previously downloaded another application for
Excel, and once removed, my application behaved as it should. Does anyone
know why those other applications interfered with my procedures? What they
might have done to Excel to cause the problem? Is it a shared file or
registry issue? If so, is there a fix short of uninstalling those
programs?
Please suggest if you know. Thank you in advance.

Jim Kobzeff