WinUSB x64 system app shows winusb.dll not found

Discussion in 'Windows Vista Drivers' started by Kid, Nov 3, 2008.

  1. Kid

    Kid Guest


    I have installed WinUSB driver for some device on WinXP 64 bit .

    Here is some problem that when my app use WinUSB API run there is some
    message which shows winsub.dll is not found .

    But winusb.dll is right there in Windows\System32 , what's the problem ?

    This problem did not happen on WinXP 32 bit .

    Thank for your helping .
    Kid, Nov 3, 2008
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  2. You need to install both x86 and x64 variants of the DLL. x64 one goes to
    system32, x86 one goes to syswow64.
    Alexander Grigoriev, Nov 3, 2008
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