You can choice FileOpen Dialog via OAWD. But there we have the next issue:
- No support for Microsoft common dialogs
Scripting for common dialogs (such as FileSave, FileOpen) is not supported.
I do not know if we have another Transaction beside OAWD which can get file-path as string Input.
When you want use MS Comm Dialog FileOpen you Need to use an seperate macro-enabled Excel instance which can control MS Comm FileOpen via USER32-Api calls during execution of SAP Session code.
This is an complex Workaround. Don´t know if this make any sense for your requirements.