Binary Compatibility

[kinook]

What exactly do you mean by 'It does not seem to make any difference.'? Testing here with VBP v6.6 and the sample at %ProgramFiles%\VisBuildPro6\Samples\Visual Studio\VStudio.bld (which creates VB6 projects similar to what you described under %TEMP%\VisBuildPro\VStudio\work\Source\VS6 when built), after building the 'Build VB6 projects' step, then modifying the signature of DoSomething() in SecondVB\SecondVB.vbp -> Class2.cls (and the corresponding call in FirstVB\FirstVB.vbp -> First.frm if needed), rebuilding the 'Build VB6 Projects' step fails with the expected compatibility error, but changing the aforementioned option to 'Project compability' and rebuilding works. Please tweak that sample to demonstrate the problem. Thanks.