For getting NotePad++ to load the file you could register that application as the default editor and then use the ShellExecute Windows API function to launch it:

https://www.rgagnon.com/pbdetails/pb-0008.html

Or, you can also use the ShellExecuteEx Windows API function to call NotePad++ when it isn't the default editor:

https://www.rgagnon.com/pbdetails/powerbuilder-launch-executable-capture-its-handle.html

Hi BKR;

  FWIW: I would use the Library export() + the Run() command to export the DWO source and then launch NotePad++ App passing the DWO source file as an argument to the NP EXE.Then after editing & saving the DWO source, I would use the LibraryImport() command to put the updated DWO source back into its PBL.  HTH

Regards ... Chris 

What you could try:

- Start notepad++

- Use FindWindowEx function from Windows API to find the Notepad++ window.

- Use SendMessage to send WM_SETTEXT Message to the Window with the text you want to copy.

Hello,

You can write the contents to a text file using

FileOpen, FileWrite, FileClose 

functions.  After completing, you could open the file using Notepad++

HTH

Happiness Always
BKR Sivaprakash