53 BOOL LoadImageFile(HWND hwnd, PTSTR pstrPathName,
57 BOOL DisplayImage (HWND hwnd, BYTE **ppDib,
83     HWND     hwnd;  in WinMain()  local
124     hwnd = CreateWindow (szProgName, szAppName,  in WinMain()
131     ShowWindow (hwnd, iCmdShow);  in WinMain()
132     UpdateWindow (hwnd);  in WinMain()
138         if (!TranslateAccelerator (hwnd, hAccel, &msg))  in WinMain()
147 LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,  in WndProc()  argument
181         PngFileInitialize (hwnd);  in WndProc()
199             if (!LoadImageFile (hwnd, szImgPathName,  in WndProc()
205             InvalidateRect (hwnd, NULL, TRUE);  in WndProc()
209             DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize,  in WndProc()
221         InvalidateRect (hwnd, NULL, TRUE);  in WndProc()
225         DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize,  in WndProc()
231         hMenu = GetMenu (hwnd);  in WndProc()
241         hMenu = GetMenu (hwnd);  in WndProc()
249             if (!PngFileOpenDlg (hwnd, szImgPathName, szTitleName))  in WndProc()
260             if (!LoadImageFile (hwnd, szImgPathName,  in WndProc()
266             InvalidateRect (hwnd, NULL, TRUE);  in WndProc()
270             DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize,  in WndProc()
279             if (!PngFileSaveDlg (hwnd, szImgPathName, szTitleName))  in WndProc()
294                 MessageBox (hwnd, TEXT ("Error in saving the PNG image"),  in WndProc()
310                 if (!LoadImageFile (hwnd, szImgPathName, &pbImage,  in WndProc()
316                 InvalidateRect (hwnd, NULL, TRUE);  in WndProc()
320                 DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize,  in WndProc()
339                 if (!LoadImageFile (hwnd, szImgPathName, &pbImage, &cxImgSize,  in WndProc()
345                 InvalidateRect (hwnd, NULL, TRUE);  in WndProc()
349                 DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize,  in WndProc()
390             InvalidateRect (hwnd, NULL, TRUE);  in WndProc()
394             DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize,  in WndProc()
400             DialogBox (hInstance, TEXT ("AboutBox"), hwnd, AboutDlgProc) ;  in WndProc()
408         hdc = BeginPaint (hwnd, &ps);  in WndProc()
414         EndPaint (hwnd, &ps);  in WndProc()
428     return DefWindowProc (hwnd, message, wParam, lParam);  in WndProc()
661 BOOL LoadImageFile (HWND hwnd, PTSTR pstrPathName,  in LoadImageFile()  argument
689         SetWindowText (hwnd, szTmp);  in LoadImageFile()
693         MessageBox (hwnd, TEXT ("Error in loading the PNG image"),  in LoadImageFile()
705 BOOL DisplayImage (HWND hwnd, BYTE **ppDib,  argument
731         MessageBox (hwnd, TEXT ("Visual PNG: image is too big");
736         MessageBox (hwnd, TEXT ("Error in displaying the PNG image"),
856             MessageBox (hwnd, TEXT ("Visual PNG: stretched image is too big");