IMAGES SUR DIALOGBOX PAR DLL (WIN32)

#include <windows.h>
#include "resource.h"
#include "bnJpg32.h"

HBITMAP hbmp;
int cxDib, cyDib, idximg;
char *szimages[3] = {"Chat.jpg","Evol.gif","Verdi.bmp"};

void __stdcall ImgLoad()
{
  HANDLE hfl;
  DWORD lenfl, val;
  HANDLE hheap;
  BYTE *pmem;
  BITMAP bmp;
  if(hbmp) {DeleteObject(hbmp); hbmp = 0;}
  hfl = CreateFile(szimages[idximg], GENERIC_READ, 0, 0, OPEN_EXISTING,
                   FILE_FLAG_SEQUENTIAL_SCAN, 0);
  if(hfl == INVALID_HANDLE_VALUE) return;
  lenfl = GetFileSize(hfl, 0);
  hheap = GetProcessHeap();
  pmem = (BYTE*) HeapAlloc(hheap, 0, lenfl);
  if(pmem) ReadFile(hfl, pmem, lenfl, &val, 0);
  CloseHandle(hfl);
  if(!pmem) return;
  hbmp = bnBmpFromMemory(pmem, lenfl);
  HeapFree(hheap, 0, pmem);
  if(hbmp) {
    if(GetObject(hbmp, sizeof(bmp), &bmp)) {
      cxDib = bmp.bmWidth; cyDib = bmp.bmHeight;
    }
  }
}

void __stdcall onPaint(HWND hdlg)
{
  PAINTSTRUCT ps;
  HDC hdc, memdc;
  RECT rct;
  hdc = BeginPaint(hdlg, &ps);
  if(hbmp) {
    GetClientRect(hdlg, &rct);
    memdc = CreateCompatibleDC(hdc);
    SelectObject(memdc, hbmp);
    StretchBlt(hdc, 0, 0, rct.right, rct.bottom, memdc, 0, 0, cxDib, cyDib, SRCCOPY);
    DeleteDC(memdc);
  }
  EndPaint(hdlg, &ps);
}

BOOL CALLBACK AppDlgProc(HWND hdlg, UINT mssg, WPARAM wParam, LPARAM lParam)
{
  switch(mssg) {
    case WM_PAINT:
      onPaint(hdlg);
      break;
    case WM_TIMER:
      if(++idximg > 2) idximg = 0;
      ImgLoad();
      InvalidateRect(hdlg, 0, 0);
      break;
    case WM_INITDIALOG:
      SetClassLong(hdlg, GCL_HICON, (long)LoadIcon(0, IDI_APPLICATION));
      idximg = 0;
      ImgLoad();
      SetTimer(hdlg, 1, 1500, 0);
      return 1;
    case WM_COMMAND:
      if(wParam == IDCANCEL) {KillTimer(hdlg, 1); EndDialog(hdlg, 0);}
  }
  return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE, PSTR, int)
{
  DialogBoxParam(hInstance, MAKEINTRESOURCE(IDD_APP), 0, AppDlgProc, 0);
  return 0;
}