vxd.asm

自己用汇编语言编写的一个vxd

OpenVxD:
        push    L NULL
        push    L FILE_FLAG_DELETE_ON_CLOSE
        push    L FALSE
        push    L NULL
        push    L FALSE
        push    L FALSE               
        push    offset VxDName
        call    CreateFileA
        mov     Vxd_Handle,eax
        cmp     eax,-1
        je      VxDError
        ret
CloseVxD:
        push    [Vxd_Handle]
        call    CloseHandle
        mov     eax,1
        ret                     ;All Ok!!

VxDError:
        push    L 0
        call    MessageBeep
        push    L MB_ICONEXCLAMATION
        push    offset ErrHeader
        push    offset VxDErrorTxT
        push    [newhwnd]
        call    MessageBoxA
        ret

UseVxD: push    L NULL
        push    offset vxdbytesret      ;lp to bytes returned
        push    L FALSE                 ;size of output buffer
        push    L NULL                  ;lp to output data
        push    L FALSE                 ;size of input buffer
        push    L NULL                  ;lp to input data
        push    [ControlCode]           ;Control code 1
        push    [Vxd_Handle]
        call    DeviceIoControl
        ret