懂VC++的高手来 急!!
调用第三方动态库,对方提供的函数
int __stdcall StartVideoPreview(HANDLE hChannelHandle,HWND WndHandle, RECT *rect,BOOLEAN bOverlay, int VideoFormat, int FrameRate)
HANDLE hChannelHandle;通道句柄
HWND WndHandle;显示窗口句柄
RECT *rect;显示窗口内的矩形区域
BOOLEAN bOverlay;是否启用 Overlay预览模式*
int VideoFormat;视频预览格式(目前无效)
int FrameRate;视频预览帧率(PAL:1-25,NTSC:1-30)
我用C#是这么写的
SysJianKong.CSRect rc = new SysJianKong.CSRect();
rc.left = 0;
rc.top = 5;
rc.right = this.panel1.Size.Width;
rc.bottom = this.panel1.Size.Height;
IntPtr intptr = SysJianKong.ChannelOpen(4)
SysJianKong.StartVideoPreview(intptr, this.panel1.Handle, rc, false, 0,25);
//class SysJianKong 中定义
[DllImport("DS40xxSDK.dll", EntryPoint = "StartVideoPreview")]
public static extern int StartVideoPreview(IntPtr hChannelHandle, IntPtr WndHandle, CSRect rect, bool bOverlay, int VideoFormat, int FrameRate);
public struct CSRect
{
public int bottom;
public int left;
public int right;
public int top;
}
可是总是报一个错误 “尝试读取或写入受保护的内存。这通常指示其他内存已损坏”
高手帮忙 急!!!