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Starting from main() instead of WinMain()

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ctacke

877 Posts

Posted - 03 Feb 2003 : 14:01:44

Q: I'm porting an old application from Windows 98 that starts in main with thie following signature:

void main( int argc, char *argv[], char *envp[] )

I cannot get my CE application to link. It always reports:
error LNK2019: unresolved external symbol WinMain referenced in function WinMainCRTStartup

How do I get my application to start up in main()?

Windows CE projects started with eVC default to an entry point of WinMain() but you can change this by following these steps:

From the eVC manubar open the Project | Settings dialog.
Select the Link tab
Change the Category dropdown to "Output"
Change the Entry-point symbol from "WinMainCRTStartup" to "main"

whuh

23 Posts

Posted - 03 Feb 2003 : 14:24:19

Actual parameters to main() will be same as WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLine, int nShowCmd)

To get command parameters, decode lpCmdLine.

Joelw

30 Posts

Posted - 11 Feb 2003 : 14:22:52

It is easier to leave main() code intact and change Entry-point symbol from "WinMainCRTStartup" to "mainACRTStartup" ;-)

parsing main() argc with wrong entry-point yields an invalid number, but compiles ok.

Try to find this in the documentation!!

ctacke

877 Posts

Posted - 03 Jun 2003 : 15:02:01

Also it is notable that this depends on the signature of you entry point.

If you're starting with:
int main(int argc, char *argv[])
then the entry point is mainACRTStartup

But if you're starting with:
int _tmain(int argc, TCHAR *argv[])
then the entry point is mainWCRTStartup

For more info take a look at this article.

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