//------------------------------------------//  PNGFILE.H -- Header File for pngfile.c//------------------------------------------// Copyright 2000, Willem van Schaik.  For conditions of distribution and// use, see the copyright/license/disclaimer notice in png.h#include <stdio.h>#include <stdlib.h>#include <string.h>#include <windows.h>void PngFileInitialize (HWND hwnd) ;BOOL PngFileOpenDlg (HWND hwnd, PTSTR pstrFileName, PTSTR pstrTitleName) ;BOOL PngFileSaveDlg (HWND hwnd, PTSTR pstrFileName, PTSTR pstrTitleName) ;BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData,                    int *piWidth, int *piHeight, int *piChannels, png_color *pBkgColor);BOOL PngSaveImage (PTSTR pstrFileName, png_byte *pDiData,                   int iWidth, int iHeight, png_color BkgColor);#if defined(PNG_NO_STDIO)static void png_read_data(png_structp png_ptr, png_bytep data, png_size_t length);static void png_write_data(png_structp png_ptr, png_bytep data, png_size_t length);static void png_flush(png_structp png_ptr);#endif