Call to dll different in Built Application

[WPS]

I am calling the winmm.dll to drive a video display window in my application. The video card vendor has extended the mci interface. I use a call to the dll that utilises one of the extension keywords. The call to the dll works OK when I am executing in the LabVIEW development environment but doesn't work when executing as a built application. There is no issue with access to the dll as commands not using the extension are OK. Does anyone have any suggestions as to why this is occuring.
Cheers Wayne

[alipio]

Hello
Sometimes, DLL´s are not properly registered.
Try to register it using "regsvr32 your.dll"

Hope it helps.
Alipio