Window does not work.

I am creating a window with the Dev-C++ compiler. I know that the code for this comes built in but I learn better if I type it out. The thing is, after I copied it and created a new project, deleted the code and inserted my own....it compiled but the window did not show up. Is this normal? Here is the code I copied:

Code:

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#include <windows.h>

/* Declare windows procedure */
LRESULT CALLBACK WindowProcedure ( HWND, UINT, WPARAM, LPARAM);

/* Make the class name into a global variable */
char szClassName[] = "WindowsApp";

int WINAPI WinMain (HINSTANCE hThisInstance,
                    HINSTANCE hPrevInstance,
                    LPSTR lpszArgument,
                    int nFunsterStil)
{
  HWND hwnd;        /* This is the handle for our window */
  MSG messages;    /* Here messages to the application are saved */
  WNDCLASSEX wincl; /* Data structure for windows class */
 
  /* The Windows Sturcture */
  wincl.hInstance = hThisInstance;
  wincl.lpszClassName = szClassName;     
  wincl.lpfnWndProc = WindowProcedure;    /* This function is called by windows */
  wincl.style = CS_DBLCLKS;              /* Catch double clicks */
  wincl.cbSize = sizeof (WNDCLASSEX);
 
  /* Use default icon and mouse-pointer */
  wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
  wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
  wincl.lpszMenuName = NULL;                      /* No Menu */
  wincl.cbClsExtra = 0;                            /* No extra bytes after the windows class */
  wincl.cbWndExtra = 0;                            /* Structure or the window instance */
 
  /* Use windows's default background color */
  wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;
 
  /* Register the window class, if it fails quit the program */
  if (!RegisterClassEx (&wincl))
  return 0;
 
  /* The class is registered, let's create the program */
  hwnd = CreateWindowEx (
        0,                        /* Extended possibilites for variation */
        szClassName,              /* Classname */
        "My Cute Window",            /* Window Title */
        WS_OVERLAPPEDWINDOW,      /* default window */
        CW_USEDEFAULT,            /* Windows decides the position */
        CW_USEDEFAULT,            /* where the program is at on the screen */
        544,                      /* Program width */
        375,                      /* the height in pixels */
        HWND_DESKTOP,              /* The window is a child window of the desktop */
        NULL,                      /* No Menu */
        hThisInstance,            /* Program Instance handler */
        NULL                      /* No Window creation data */
        );
       
  /* Make the window visible on the screen */
  ShowWindow (hwnd, nFunsterStil);
 
  /* Run the message loop. It will run until GetMessage() return 0 */
  while (GetMessage (&messages, NULL, 0,0))
  {
        /* Translate virtual-key message into character messages */
        TranslateMessage(&messages);
        /* Send message to WindowsProcedure */
        DispatchMessage (&messages);
  }
 
  /* The program return-value is 0  -  The value that PostQuitMessage() gave */
  return messages.wParam;
}

/* This function is called by the Windows function DispatchMessage() */

LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
        switch (message)                          /* handle the messages */
        {
              case WM_DESTROY:
                    PostQuitMessage(0);          /* send a WM_QUIT to the message queue */
                    break;
              default:                          /* For messages we done deal with */
                      return DefWindowProc (hwnd, message, wParam, lParam);
        }
  return 0;
}

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RegisterClassEx is failing because you didn't initialize the hCursor member of WNDCLASSEX. Add this line.

Code:

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wincl.hCursor = LoadCursor(NULL,IDC_ARROW);

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When using a struct, it's usually a good idea to make sure you initialize the struct to 0.

Code:

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WNDCLASSEX wincl = {0};

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Edit: Changed hThisInstance to NULL.

Well I added the code and it still didn't work. After playing around with it for a while I finally figured out why it wasn't working and why I was getting the Permission denied error. When I saved the project I overwrote a previous project. So this time I just saved it and renamed it something unique and it worked fine. Does anyone know why, when you save over a project, you get the permission denied error?!?!

Well, I use Dev-C++ too, but I don't have problems with overwriting projects...

Sometimes if your program didn't close properly, (In the sence as in, the widow disappeared but the program for some reason was still running in the bg.) Then when Dev-C++ tries to write over the running application, it can't, and gets the "permission denied" error.

Well, for me, Dev-C++ doesn't let me press compile at all, when my program is still running in bg. Then I close my program from the task manager.

>> Well, for me, Dev-C++ doesn't let me press compile at all,

It only does that if you started the program through Dev-C++.
It won't if you start it through something else.