>>Is there an easy way to prevent two copies of a modeless form from running? I have been trying to use the FindWindowEx api call but I am getting frustrated with figuring out the class name of the child window I am looking for. Please help.
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>Do you mean two modeless forms within the same application?

My menu calls a form "MyForm" with "do form MyForm". I want to prohibit two running copies of "MyForm"

How do you reply so fast?