[Dev-C++] Simple window in Dev C++

[Infinity <inf...@ne...>]

 I tried to make a simple window using this code

#include <windows.h>

// Prototype of a function with Windows procedurs

LRESULT CALLBACK WindowProcedure(HWND,UINT,WPARAM,LPARAM);

// Window class name

static char gszClassName[]=3d"MyClass";

// main()

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpCmdLine, int nCmdShow)
{
      WNDCLASSEX WndClass;
      HWND hwnd;
      MSG Msg;

// Registration of a window class

WndClass.cbSize=3dsizeof (WNDCLASSEX);
WndClass.style=3dNULL;
WndClass.lpfnWndProc=3dWindowProcedure;
WndClass.cbClsExtra=3d0;
WndClass.cbWndExtra=3d0;
WndClass.hInstance=3dhInstance;
WndClass.hIcon=3dLoadIcon(NULL, IDI_APPLICATION);
WndClass.hCursor=3dLoadCursor(NULL, IDC_ARROW);
WndClass.hbrBackground=3d(HBRUSH)(COLOR_WINDOW);
WndClass.lpszMenuName=3dNULL;
WndClass.lpszClassName=3dgszClassName;
WndClass.hIconSm=3dLoadIcon(NULL, IDI_APPLICATION);

// Class registration check

if (!RegisterClassEx(&WndClass))
{
MassageBox(0,"Registration failed","Error", MB_ICONSTOP|MB_OK);
}

// Creating a window

hwnd=3dCreateWindowEx(WS_EX_STATICEDGE,
                    gszClassName,
                    "Window",
                    WS_OVERLAPPEDWINDOW,
                    CW_USEDEFAULT, CW_USEDEFAULT,
                    500, 400,
                    NULL, NULL,
                    hInstance,
                    NULL);

// Window creation check

if (hwnd=3d=3dNULL)
{
MessageBox (0, "Window creation failed","Error", MB_ICONSTOP|MB_OK);
}

// Showing a window

ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);

// message loop

while (GetMessage(&Msg, NULL, 0, 0))
{
      TranslateMessage(&Msg);
      DispatchMessage(&Msg);
}


UnregisterClass("MyClass",hInstance);
return Msg.wParam;
}// END

// Function with Windows procedurs

LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
        switch (Message) {
               case WM_CLOSE:
                    DestroyWindow(hwnd);
                    break;
               case WM_DESTROY:
                    PostQuitMessage(0);
                    break;
               default:
                       return DefWindowProc(hwnd, Message, wParam, lParam);
                       }
}


And I got the following error:

In function `int WinMain(HINSTANCE__*, HINSTANCE__*, CHAR*, int)':
23 [Warning] converting to non-pointer type `UINT' from NULL
39 `MassageBox' undeclared (first use this function)
(Each undeclared identifier is reported only once for each function it appears in.)
C:\Dev-Cpp\Makefile.win [Build Error] [main.o] Error 1
Help, Please!

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