[wpdapidrmsample] Anyone know what drivers needed for this program payne 03.07.2007 09:16:01 Currently I have successfully remodified sample source code (WpdApiDrmSample.exe) to my own application. It is able to execute succesfully in my pc. However it cannot execute on newly installed PC which haven't perform windows update. And I suspect that it might be the cause: Windows update not up-to-date. Due to network limitation, I cannot perform windows update for those PC. So Anyone know what drivers or dll needed for this WpdApiDrmSample.exe, so that I can copy and install manually PS: I have installed .Net Framework 2.0 and Windows Media Player 11 which are essential For thos who want to know more: Problem happened on Newly installed PC: When I tried to transfer 1 file to MTP device, the function Write() in Istream interface return hr = 0x80070057 (E_INVALIDARG) file tested are 3gp, mp3, wav, jpg,wmv and mp4 E_INVALIDARG means invalid argument however everytime I transfer .wma file to newly installed PC, it is OK/success. For those who are familiar with WpdApiDrmSample sample source code, you can easily find the function Write() of Istream interface in: file: ContentTransfer.cpp function: StreamCopy