case paint en dev c++

Question

j'ai ce code  dev c++ qui ne veut pas fonctionner:
#include <windows.h>
LRESULT CALLBACK MainWndProc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK MainWndProc (HWND h, UINT ms, WPARAM wp, LPARAM lp)
{     
    static BOOL rt;
       static PAINTSTRUCT ps;
           static     HDC hdc = BeginPaint(h, &ps);
           static HBRUSH hbRed, hbGreen;// hbrOld;
           static   HPEN  hp2;                   //, hpOld;
           //static  HGDIOBJ hp2px;
           static  HGDIOBJ hpOld;
          static  HGDIOBJ hbrOld,NewFont,OldFont;
        //   static      HFONT  OldFont; ////NewFont,
           static       LOGFONT lf;

       switch (ms)                  {
              case WM_PAINT:
            {
              
              char st[] = "Bienvenue sur Developpez.com" ;

              
             SetBkMode(hdc, TRANSPARENT);

              TextOut(hdc, 10, 20, st, lstrlen(st));

              Rectangle(hdc, 20, 60, 120, 100);

              hp2 = CreatePen(PS_SOLID, 2, 0x00FF0000);
              hpOld =SelectObject(hdc,hp2);

              hbRed = CreateSolidBrush(0x000000FF);
           hbrOld =SelectObject(hdc,hbRed);

              Rectangle(hdc, 160, 60, 260, 100);

              hbGreen = CreateHatchBrush(HS_DIAGCROSS, 0x0000BB00);
              SelectObject(hdc,hbGreen);
              DeleteObject(hbRed);

              Ellipse(hdc, 300, 20, 400, 120);

              MoveToEx(hdc, 20, 140, NULL);
              LineTo(hdc, 400, 140);

              SelectObject(hdc,hbrOld);
              DeleteObject(hbGreen);

              SelectObject(hdc,hpOld);
              DeleteObject(hp2);

              ZeroMemory(&lf, sizeof(LOGFONT));
              lstrcpy(lf.lfFaceName,"Times New Roman");
              lf.lfHeight = 36;
              lf.lfItalic = TRUE;
              lf.lfWeight = FW_BOLD;

              NewFont = CreateFontIndirect(&lf);
            OldFont = SelectObject(hdc,NewFont);

              SetTextColor(hdc, 0x000000FF);
              TextOut(hdc, 10, 180, st, lstrlen(st));

              SelectObject(hdc,OldFont);
              DeleteObject(NewFont);

              EndPaint(h, &ps);
              return 0;
            }

  case WM_DESTROY:    PostQuitMessage (0);          break;
  default:               return DefWindowProc (h, ms, wp, lp);   }
return 0;    }
int WINAPI WinMain (HINSTANCE h1,HINSTANCE h2,LPSTR l,int n)
{       HWND h;         MSG m;    WNDCLASSEX w;       
    w.hInstance = h1;
    w.lpszClassName = "WindowsApp";
    w.lpfnWndProc = MainWndProc;      
    w.style = CS_DBLCLKS;                
    w.cbSize = sizeof (WNDCLASSEX);
    w.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    w.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
    w.hCursor = LoadCursor (NULL, IDC_ARROW);
    w.cbClsExtra = 0;                     
    w.cbWndExtra = 0;                     
    w.hbrBackground = (HBRUSH) COLOR_BACKGROUND;
     if (!RegisterClassEx (&w))             return 0;
h = CreateWindowEx (0,"WindowsApp","Windows App",WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT, 544,375,HWND_DESKTOP,NULL,h1,NULL);
ShowWindow (h, n);
while (GetMessage (&m, NULL, 0, 0)){    TranslateMessage(&m);    DispatchMessage(&m);     }
return m.wParam;              }


merci

BruNews · Answer

static HDC hdc = BeginPaint(h, &ps);

NON, BeginPaint() nest valide que dans le message WM_PAINT.

ciao...
BruNews, MVP VC++

Case paint en dev c++

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