C/C++ DLL and LabWindows/CVI DLL Support for 64-bit TestStand

TestStand 2019 Help

Edition Date: May 2019

Part Number: 370052AA-01

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When you migrate C/C++ DLL and LabWindows/CVI DLLs from 32-bit TestStand to 64-bit TestStand or want to simultaneously support 32-bit TestStand and 64-bit TestStand, you must ensure that TestStand locates the correct DLL, account for DLLs with different 32-bit interfaces and 64-bit interfaces, and use the appropriate pointers and handles.

For the C/C++ DLL and LabWindows/CVI Adapters, the performance for calling 32-bit and 64-bit DLL code modules is similar. However, the performance for loading DLLs into memory is slightly slower for 64-bit DLLs than for 32-bit DLLs.

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