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C++ GUI Problem

 
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PostPosted: Sat Sep 27, 2008 12:01 pm    Post subject: C++ GUI Problem Reply with quote
I was following a source code I found online trying to make a bitmap GUI. My problems is that it only shows up as a grey square...

Here is my code:
Code:
#include <windows.h>
#include "resource.h"

HBITMAP GUI;
HWND MainWindow;

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

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
   WNDCLASS wc;
   MSG Message;
   POINT Points[3];
   HRGN hRGN;
   wc.style = CS_HREDRAW | CS_VREDRAW;
   wc.lpfnWndProc = WindowProc;
   wc.cbClsExtra = 0;
   wc.cbWndExtra = 0;
   wc.hInstance = hInstance;
   wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
   wc.hCursor = LoadCursor(NULL, IDC_ARROW);
   wc.hbrBackground = (HBRUSH)GetStockObject(GRAY_BRUSH);
   wc.lpszMenuName = NULL;
   wc.lpszClassName = TEXT("Class");
   if (RegisterClass(&wc) == false)
      MessageBox(NULL, TEXT("Registering Class has failed!"), TEXT("ERROR"), MB_OK + MB_ICONWARNING);
   GUI = LoadBitmap(GetModuleHandle(NULL), "IDB_BITMAP1 ");
   MainWindow = CreateWindow(TEXT("Class"), TEXT("GUI"), WS_POPUPWINDOW, 0, 0, 200, 200, NULL, NULL, hInstance, NULL);
   Points[0].x = 1;   Points[0].y = 1;
   Points[1].x = 199;   Points[1].y = 1;
   Points[2].x = 199;   Points[2].y = 199;
   Points[3].x = 1;   Points[3].y = 199;
   hRGN = CreatePolygonRgn(&Points[0], 4, WINDING);
   SetWindowRgn(MainWindow, hRGN, true);
   ShowWindow(MainWindow, SW_SHOW);
   SetWindowLong(MainWindow, GWL_EXSTYLE, GetWindowLong(MainWindow, GWL_EXSTYLE) | WS_EX_LAYERED);
   SetLayeredWindowAttributes(MainWindow, 0x00ffffff, 0, LWA_COLORKEY);
   UpdateWindow(MainWindow);
   while(GetMessage(&Message, NULL, NULL, NULL))
   {
      TranslateMessage(&Message);
      DispatchMessage(&Message);
   }
   return Message.wParam;
}

LRESULT CALLBACK WindowProc(HWND hwnd,UINT Message,WPARAM wParam,LPARAM lParam)
{
   switch(Message)
   {
      case WM_LBUTTONDOWN:
         RECT rect;
         POINTS pt;
         pt = MAKEPOINTS(lParam);
         SendMessage(MainWindow, WM_NCLBUTTONDOWN, HTCAPTION, 0);
         GetWindowRect(MainWindow, &rect);
         SetActiveWindow(MainWindow);
         break;
      case WM_PAINT:
         PAINTSTRUCT ps;
         HDC kon, pom;
         kon = BeginPaint(MainWindow, &ps);
         pom = CreateCompatibleDC(kon);
         SelectObject(pom, GUI);
         BitBlt(kon, 0, 0, 200, 200, pom, 0, 0, SRCCOPY);
         DeleteDC(pom);
         EndPaint(MainWindow, &ps);
         break;
      case WM_DESTROY:
         PostQuitMessage(0);
         break;
      default:
         return (DefWindowProc(hwnd,Message,wParam,lParam));
   }
   return 0;
}


Here is my bitmap


Anyone know my problem.
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hcavolsdsadgadsg
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PostPosted: Sat Sep 27, 2008 12:12 pm    Post subject: Reply with quote
You'll probably find the LoadImage function more useful.

http://msdn.microsoft.com/en-us/library/ms648045.aspx
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kitterz
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PostPosted: Sat Sep 27, 2008 12:17 pm    Post subject: Reply with quote
you made sure you defined IDB_BITMAP1 and put it to a proper image?

like for an Icon it is

Code:
IDI_MYICON ICON "Icon.ico"


I dunno what for bitmap
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Heartless
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PostPosted: Tue Sep 30, 2008 6:34 pm    Post subject: Reply with quote
I still get the same problem when I use this:

Code:
GUI = (HBITMAP)LoadImage(hInstance, TEXT("IDB_BITMAP1"), IMAGE_BITMAP, LR_DEFAULTSIZE, LR_DEFAULTSIZE, LR_DEFAULTCOLOR);

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lurc
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PostPosted: Tue Sep 30, 2008 6:36 pm    Post subject: Reply with quote
change

TEXT("IDB_BITMAP1")

to

MAKEINTRESOURCE(IDB_BITMAP1)
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Heartless
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PostPosted: Tue Sep 30, 2008 6:39 pm    Post subject: Reply with quote
Thankyou lurc, it worked.
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