Advantech DVP-7020, User Manual

Page: 43 / 65

Adv_VAPI_SetCaptureWindow
Syntax
[C++]
BOOL Adv_VAPI_SetCaptureWindow(int nChannelNo,HWND
hWnd,int nFrameCount,Adv_CompleteProc pCall)
[Delphi]
function Adv_VAPI_SetCaptureWindow(nChannelNo:Integer;
hWnd:HWND; nFrameCount:Integer;
pCall:Adv_CompleteProc):Boolean;
[VB]
function Adv_VAPI_SetCaptureWindow (ByVal nChannelNo As
Integer, ByVal Hwnd As Long, ByVal nFrameCount As Integer, ByVal
pCall As Long) As Boolean
Parameters
nChannelNo : Specifies the video channel number on
current physical port. Its range is 0~3.
hWnd : Specifies the capture window handle for the
video channel on current physical port. If the
handle is NULL, the capture window of
video channel will be canceled.
nFrameCount : Specifies total frame number to capture. If the
value is ALWAYS_CAPTURE, the capture
frame is endless.
pCall : Pointer to callback function to notify the
capture completed. The function should be
declared as follows:
BOOL CALLBACK YourCompleteProc (DWORD
dwStatus)
The value of the parameter dwStatus has one
of the following:
DEST_HWND defines windows capture
completed.
DEST_BUF defines buffer capture
completed.
DEST_FILE defines file capture
completed.
Return Value
TRUE : Function is successful
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