#include <windows.h> 
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);  
//Deklaration der Windows-Nachrichten-Prozedur 

int WINAPI WinMain (HINSTANCE hI, HINSTANCE hPrI, PSTR szCmdLine, int iCmdShow) 
{ 
char szName[] = "Fensterklasse"; 
WNDCLASS wc; 

wc.style         = CS_HREDRAW | CS_VREDRAW;   // CS = "class style" 
wc.lpfnWndProc   = WndProc; 
wc.cbClsExtra    = 0; 
wc.cbWndExtra    = 0; 
wc.hInstance     = hI; 
wc.hIcon         = LoadIcon (NULL, IDI_WINLOGO); 
wc.hCursor       = LoadCursor (NULL, IDC_ARROW); 
wc.hbrBackground = (HBRUSH) GetStockObject (BLACK_BRUSH); 
wc.lpszMenuName  = NULL; 
wc.lpszClassName = szName; 

RegisterClass (&wc); 

HWND hwnd = CreateWindow (szName, "", WS_SYSMENU | WS_THICKFRAME,  
                          0, 0, 200, 100, NULL, NULL, hI, NULL); 

ShowWindow   (hwnd, iCmdShow); 
UpdateWindow (hwnd); 

// Nachrichten-Schleife 
MSG msg; 
    while (GetMessage (&msg, NULL, 0, 0)) 
    { 
        TranslateMessage (&msg); 
        DispatchMessage (&msg); 
    } 
return msg.wParam; 
} 

// Windows-Nachrichten-Prozedur 
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) 
{ 
HDC hdc; 
PAINTSTRUCT ps; 

switch (message) 
{ 
case WM_PAINT: 
    hdc = BeginPaint (hwnd, &ps); 
        TextOut (hdc, 20, 20, "Ich bin ein Fenster.", 20); 
    EndPaint (hwnd, &ps); 
    return 0; 

case WM_DESTROY: 
    PostQuitMessage (0); 
    return 0; 
} 

return DefWindowProc (hwnd, message, wParam, lParam); 
}

Dabei erschein folgender Fehler: [Linker error] undefined reference to GetStockObject@4' \[Linker error\] undefined reference toTextOutA@20'
ld returned 1 exit status

Hat jemand ne Idee was der Fehler ist oder kennt jemand ein besseres Tutoriel?

ShowWindow   (hwnd, iCmdShow);

der Befehl iCmdShow.

int WINAPI WinMain (HINSTANCE hI, HINSTANCE hPrI, PSTR szCmdLine, int iCmdShow)