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QueryInterface failed

hi,

i got an error QueryInterface for interface DocMgr._clsDocMgr failed where
DocMgr is a COM object written by VB6. I just compiled DocMgr with a changed
revision but SAME classid (binary compatiblity is true). why do i get this
error?

will changing revision of a COM will generate this error? do i need to
compile my program everytime i compiled DocMgr which is a common module. it
seems not a good method.

btw, i included the COM by Add COM Reference.

any ideas?

thanks!
Nov 16 '05 #1
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