Big problem :(

Fixed. Thanks.

Which window are you trying to use ShowWindow() on?

You are using a main (console app) not a winmain (windows app)

You declare a variable and use it before initialising it.

Code:

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HWND hwndMain; //not inititalised

ShowWindow(hwndMain, SW_FORCEMINIMIZE);//will fail as not told WHICH window to minimise

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As a general rule I suggest you;

Init ALL variables in the declaration.

Check returns from WIN32 functions

If they fail (check the return code in MSDN) use GetLastError() to find out why.

You need to work a little on that indentation of yours, too.
It will do you wonders. Good luck.

Yeah thanks guys. I initialized it,

Code:

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hwndMain=FindWindowA("ConsoleWindowClass",NULL);

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And now it works... I'm going to start working on my indentation too... It'll be easier to read. Thanks again to both of you.