Here is a Quick Tip to find out if TestComplete is running on 64 Bit or 32 Bit OS Platform.

If dotNET.System.Environment.Is64BitOperatingSystem = True Then
 Log.Message("64Bit")
Else
 Log.Message("32Bit")
End If

You can access the .NET Framework System.Environment class’s property Is64BitOperatingSystem to find out if the OS Platform is 64 Bit or 32 Bit using the TestComplete dotNET object. The dotNET object allows access to .NET Framework classes as well as custom assemblies through TestComplete.