In LabWindows Help, go to the Index tab and enter Debugging DLLs. It shows two ways to debug a DLL. Either way, you need to create another project that calls the DLL.
The easiest way is to create an executable that calls the DLL, then open the DLL project and in the Project window, select Run, then Select External Process, and enter the name of your new executable. This makes it easy to modify the DLL, rebuild it, and run it again.
You can include both your executable project and the DLL project in the same workspace and switch between projects by selecting File >> Set Active Project. Generally, you don't have to switch back to the executable unless you change the exported DLL function prototypes or add new functions that your executable will call.
Your
External Process doesn't have to be a CVI project. It can be Visual C++, Visual Basic, etc.
LabWindows CVI includes sample projects for debugging DLLs. Look at ..\samples\dlldebug\scope.prj and usescope.prj.
