Thank you so much Martyn.
I copied the 64 bit dlls to the related folder.
I recompiled the PS5000a program. Now it can starts and displays the first massage "PS5000a VB.Net example program". However, I got the exception as "An unhandled exception of type 'System.BadImageFormatException' occurred in PS5000a.exe
Additional information: An attempt was made to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B)"
when it runs to the next statement: status = ps5000aOpenUnit(handle, vbNullString, DeviceResolution.PS5000A_DR_12BIT) below:
Dim status As UInteger
Dim handle As Short
Console.WriteLine("PS5000a VB.Net example program" & vbNewLine & "==============================" & vbNewLine)
status = ps5000aOpenUnit(handle, vbNullString, DeviceResolution.PS5000A_DR_12BIT)
Can you advise what could be wrong here?
Thanks a lot