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October 23, 2020
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An Image Viewer

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Environment: Visual C++ 6.0 with Service Pack 3, Windows 9x, Windows NT 4.0 with Service Pack 6a and Windows 2000

This sample is an MFC application using the document/view architecture that can load, display and print graphics files like GIF, JPEG, BMP (bitmap), ICO (icon), WMF (metafile) and EMF (Win32-enhanced metafile). It shows

  • how to use the OleLoadPicturePath function and the IPicture interface to load and display those graphics files.

  • (Look into the ImgViewerDoc.cpp, ImgViewerView.cpp and MainFrm.cpp files.)
  • how to support more than one file extension per MFC document type.

  • (Look into the MulExtDocTmp.cpp, MulExtDocTmp.h and ImgViewer.cpp files.)

References:

Please see the following article in the Microsoft Knowledge Base:

Q218972 How To Load and Display Graphics Files w/LOADPIC.EXE
(Note that LOADPIC.EXE does not handle palettes. As a result, it won't display a 256-color image correctly in 256-color mode. Also, it uses the OleLoadPicture function instead of the OleLoadPicturePath function.)
Q141921 HOWTO: How to Support Two File Extensions per MFC Document Type
Q198538 DocMgrEx.exe Assoc Multiple File Extensions w/1 Doc Type

Downloads

Download Source Code - 22KB

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This article was originally published on July 28, 2000

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