Win32: "Save as" dialog file name hint

Some "Save as" dialogs provide a default file开发者_StackOverflow中文版 name - how is it done?

I know how to create basic "Save as" dialog: OPENFILENAME, GetSaveFileName, and all that. But where should I put the string representing, say the file name of currently opened file? I thought it would come from .lpstrFile but this is not the case...

Update: I was not using static char path in WinProc. Now I am, and it works!

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Actually, it does come from lpstrFile. The documentation says:

lpstrFile: Long pointer to a buffer that contains a file name used to initialize the File Name edit control. [...]

Maybe you could give a short(!) code example that can be used to reproduce your problem?