Microsoft KB Archive/85676

{|
 * width="100%"|

Windows Help and Help Compiler Capacity Limits

 * }

Q85676

-

The information in this article applies to:


 * Microsoft Windows Software Development Kit (SDK) 3.1

-

SUMMARY
The following lists the limits of the Windows Help application, version 3.1. These limits are subject to change in future versions.

Paragraph size(1): approximately 32,000 bytes

Topic title string length: 127 characters

Topics per RTF source file: approximately 32,700

Topics per help file: 42,000,000

By-reference bitmaps per help file : 32,767

Help file size: approximately 2,157,000,000 bytes (2 gigabytes) Topic footnote character limit: 1023 characters

Keywords per help file: limited only by file size

Keyword length: 255 bytes

Topics per keyword(2): < 800

Browse sequence length: limited only by the number of topics

Bookmarks per help file: limited only by file size

Annotations per topic: 1

Annotations per help file: 32,767

History list length: 40 topics

Text that can be copied to clipboard: limited only by machine memory

Macro length: 512 characters

Main windows per topic: 1

Secondary windows per topic: 5


 * 1) The maximum paragraph size includes graphics pasted into the RTF source. Therefore, each pasted graphic is limited to 32,000 bytes. To work around this limitation, import large bitmaps by reference.
 * 2) Performance degrades for files with more than several hundred topics. The Search dialog box displays a maximum of 400 topics.

Additional query words: no32bit 3.10 HC HCP.EXE HC31.EXE WinHelp

Keywords : kb16bitonly

Issue type :

Technology : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK310