When using Visual COBOL R4 to create a Windows Presentation Foundation (WPF) project, the COBOL tab on the project properties shows as blank.
It appears that this problem is a known issue in R4 that has been fixed in subsequent releases. For R4 the workaround is as follows:
Create a WPF application and then change the output type on the Application tab of the project properties page from Windows Application to Console Application and back again. After saving and reloading the project the COBOL tab should be accessible.