Hey guys, I don't know whats up with this API. I tried going IsGUIThread(TRUE); but it would complain that IsGUIThread is a undeclared identifier. So then I went to MSDN and copy pasted this in my codeNow that error was gone but a new one came,Code:BOOL IsGUIThread( BOOL bConvert );Any help on this one?Code:unresolved external symbol "int __cdecl IsGUIThread(int)" (?IsGUIThread@@YAHH@Z)