vfw.ef

摄像监控：系统云台镜头控制系统。使用VB开发语言

import efapi;
公开 类 vfw
{       /*
	公开 初始化()
	{
	}*/
         //----------------------------------------------
	//本类库由halflifezy完成,转载请保留原作者名,谢谢|
	//-----------------------------------------------
	
	public static int WS_CHILD=0x40000000;
	public static int WS_VISIBLE=0x10000000;
        //private static int WM_USER=0x0400;
	//private static int WM_CAP_DRIVER_CONNEC=WM_USER+10;
	private static int WM_CAP_DRIVER_DISCONNECT=0x400+11;
	private static int WM_CAP_SET_SCALE=0x0400+53;
	private static int WM_CAP_SET_PREVIEWRATE=0x0400+52;
	private static int WM_CAP_SET_PREVIEW=0x0400+50;
	private static int WM_CAP_FILE_SAVEDIB=0x0400+100+25;

        private static DestroyWindow(int hWnd)
	{
		int dllhandle=efapi.装载DLL("user32.dll");
		int procaddr=efapi.取API地址(dllhandle,"DestroyWindow");
		efapi.调用(procaddr,hWnd);
		efapi.卸载DLL(dllhandle);
	}
	
	private static int SendMessageW(int hWnd,int Msg,int wParam,int lParam)
	{
		int dllhandle=efapi.装载DLL("user32.dll");
		int procaddr=efapi.取API地址(dllhandle,"SendMessageW");
		int result=efapi.调用(procaddr,hWnd,Msg, wParam,lParam);
		efapi.卸载DLL(dllhandle);
		return result;
	}

	private static int capCreateCaptureWindowW( string WindowName,int dwStyle,int x,int y,int nWidth,int nHeight,int hWnd,int nID)
	{   
	int WindowNameAddr=efapi.取文本地址(WindowName);
	int dllhandle=efapi.装载DLL("avicap32.dll");
	int procaddr=efapi.取API地址(dllhandle,"capCreateCaptureWindowW");
	int wnd;
        wnd=efapi.调用(procaddr,WindowNameAddr,dwStyle,x,y,nWidth,nHeight,hWnd,nID);
	//efapi.卸载DLL(dllhandle);   //该函数无法使用这句，不然出错
	return wnd;   	
	}

	public static int 创建采集窗口(string 窗口名字,int 窗口风格,int x,int y,int nWidth,int nHeight,int 窗口句柄,int nID)
	{     
		return capCreateCaptureWindowW( 窗口名字, 窗口风格, x, y, nWidth, nHeight, 窗口句柄, nID);
	}

	public static 连接设备(int 窗口句柄)
	{      int WM_CAP_DRIVER_CONNECT=0x0400+10;
	SendMessageW(窗口句柄,WM_CAP_DRIVER_CONNECT,0,0);
	}

	public static 设置缩放允许(int 窗口句柄)
	{      
	SendMessageW(窗口句柄,WM_CAP_SET_SCALE,1,0);
	}

	public static 预览(int 窗口句柄)
	{
		SendMessageW(窗口句柄,WM_CAP_SET_PREVIEWRATE, 66, 0);	
		SendMessageW(窗口句柄,WM_CAP_SET_PREVIEW,1, 0);
	}

	public static 照相(int 窗口句柄,string 文件名)
	{      int straddr=efapi.取文本地址(文件名);
		SendMessageW(窗口句柄,WM_CAP_FILE_SAVEDIB,0,straddr);	
	}

	public static 停止(int 窗口句柄)
	{
		SendMessageW(窗口句柄,WM_CAP_DRIVER_DISCONNECT,0,0);	
	}

	public static 销毁采集窗口(int 窗口句柄)
	{      //int wm_destroy=0x0002;
	//SendMessageW(窗口句柄,wm_destroy,0,0);
	DestroyWindow(窗口句柄);
	}
}