发两个BMP转JPG和bmp转gif的控件及适用方法

//bmp to gif void CConvertGIfDlg::OnBrown() { CFileDialog dlg(TRUE,"bmp",NULL,NULL,"位图文件(BMP)|*.bmp",this); if (dlg.DoModal()==IDOK) { m_FileName = dlg.GetPathName(); UpdateData(FALSE); } if (!m_FileName.IsEmpty()) { HANDLE handle = ::LoadImage(AfxGetInstanceHandle(),m_FileName,IMAGE_