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Migrating Sybase Powerbuilder (winform target type 12.5.2) to Appeon Powerbuilder (Classic target type 2022 R3)
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  1. Shashank S
  2. PowerBuilder
  3. Wednesday, 25 March 2026 10:49 AM UTC

We are currently migrating an application from Sybase PowerBuilder 12.5.2 ( WinForms target help page using PBDOTNET) to Appeon PowerBuilder Classic 2022R3.

In the existing code, we used the following .NET-based help invocation:

#IF DEFINED PBDOTNET
    System.Windows.Forms.Help.ShowHelp(_parent, ls_help_file, _hn.KeywordIndex, ls_help_key)
#END IF


Since PBDOTNET is not supported in Appeon Classic, we are replacing this with native PowerBuilder functionality.

We attempted to use the Help() function as follows:

Help(aw_parent, ls_help_file, Keyword!, ls_help_key)


However, we encountered:
C0051: Unknown function name: Help

From initial analysis, this seems to be related to the context where the function is being called (non-window object / DataWindow).

Questions:

  1. What is the recommended approach in Appeon Classic to replace System.Windows.Forms.Help.ShowHelp()?
  2. Is Help() the correct replacement, and if so, what is the proper way to invoke it from non-visual objects?
  3. Are there any limitations with Keyword! navigation when using CHM help files in Appeon?
  4. Is using Run("hh.exe ...") considered a reliable alternative in production scenarios

Any guidance or best practices for handling help file integration during PBDOTNET → Appeon Classic migration would be appreciated.

SAP ASE temporary env error using OAuthClient REST
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