C#的问题：请问VC中的 hbitmap 在C#中如何写呢？(小女子刚刚开始学习这门，请各位大侠多多帮忙...)

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解决方案 »

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句柄用int就ok了
女的男的都告诉
我不懂这个
///
/// 截取部分屏幕
///
///左上角
///右下角
///是否全屏幕
/// 返回值Bitmap
public static Bitmap GetPartScreen(Point P1,Point P2,bool Full)
{
    IntPtr hscrdc,hmemdc;
    IntPtr hbitmap,holdbitmap;
    int nx,ny,nx2,ny2;
    nx=ny=nx2=ny2=0;
    int nwidth, nheight;
    int xscrn, yscrn;
    hscrdc = CreateDC("DISPLAY", null, null, 0);//创建DC句柄
    hmemdc = CreateCompatibleDC(hscrdc);//创建一个内存DC
    xscrn = GetDeviceCaps(hscrdc, GetDeviceCapsIndex.HORZRES);//获取屏幕宽度
    yscrn = GetDeviceCaps(hscrdc, GetDeviceCapsIndex.VERTRES);//获取屏幕高度
    if(Full)//如果是截取整个屏幕
    {
        nx = 0;
        ny = 0;
        nx2 = xscrn;
        ny2 = yscrn;
    }
    else
    {
        nx = P1.X;
        ny = P1.Y;
        nx2 =P2.X;
        ny2 =P2.Y;
        //检查数值合法性
        if(nx<0)nx = 0;
        if(ny<0)ny = 0;
        if(nx2>xscrn)nx2 = xscrn;
        if(ny2>yscrn)ny2 = yscrn;
    }
    nwidth = nx2 - nx;//截取范围的宽度
    nheight = ny2 - ny;//截取范围的高度
    hbitmap = CreateCompatibleBitmap(hscrdc, nwidth, nheight);//从内存DC复制到hbitmap句柄
    holdbitmap = SelectObject(hmemdc, hbitmap);
    BitBlt(hmemdc, 0, 0, nwidth, nheight,hscrdc, nx, ny,(UInt32)0xcc0020);
    hbitmap = SelectObject(hmemdc, holdbitmap);
    DeleteDC(hscrdc);//删除用过的对象
    DeleteDC(hmemdc);//删除用过的对象
    return Bitmap.FromHbitmap(hbitmap);//用Bitmap.FromHbitmap从hbitmap返回Bitmap
}   所用到的API声明:[DllImport("gdi32.dll")]
public static extern IntPtr CreateDC(
string lpszDriver,        // driver name
string lpszDevice,        // device name
string lpszOutput,        // not used; should be NULL
UInt32 lpInitData  // optional printer data
);

[DllImport("gdi32.dll")]
public static extern IntPtr CreateCompatibleDC(
IntPtr hdc // handle to DC
);

[DllImport("gdi32.dll")]
public static extern int GetDeviceCaps(
IntPtr hdc,     // handle to DC
GetDeviceCapsIndex nIndex   // index of capability
);[DllImport("gdi32.dll")]
public static extern IntPtr CreateCompatibleBitmap(
IntPtr hdc,        // handle to DC
int nWidth,     // width of bitmap, in pixels
int nHeight     // height of bitmap, in pixels
);[DllImport("gdi32.dll")]
public static extern IntPtr SelectObject(
IntPtr hdc,          // handle to DC
IntPtr hgdiobj   // handle to object
);[DllImport("gdi32.dll")]
public static extern int BitBlt(
IntPtr hdcDest, // handle to destination DC
int nXDest,  // x-coord of destination upper-left corner
int nYDest,  // y-coord of destination upper-left corner
int nWidth,  // width of destination rectangle
int nHeight, // height of destination rectangle
IntPtr hdcSrc,  // handle to source DC
int nXSrc,   // x-coordinate of source upper-left corner
int nYSrc,   // y-coordinate of source upper-left corner
UInt32 dwRop  // raster operation code
);[DllImport("gdi32.dll")]
public static extern int DeleteDC(
IntPtr hdc          // handle to DC
);/// <summary>
  /// GetDeviceCaps使用的枚举
  /// </summary>
  [Flags()]
  public enum GetDeviceCapsIndex
  {
   /// <summary>
   /// 设备的版本
   /// </summary>
   DRIVERVERSION=0,
   TECHNOLOGY=2,
   HORZSIZE=4,
   VERTSIZE=6,
   /// <summary>
   /// 屏幕宽度
   /// </summary>
   HORZRES=8,
   /// <summary>
   /// 屏幕高度
   /// </summary>
   VERTRES=10,
   LOGPIXELSX=88,
   LOGPIXELSY=90,
   BITSPIXEL=12,
   PLANES=14,
   NUMBRUSHES=16,
   NUMPENS=18,
   NUMFONTS=22,
   NUMCOLORS=24,
   ASPECTX=40,
   ASPECTY=42,
   ASPECTXY=44,
   PDEVICESIZE=26,
   CLIPCAPS=36,
   SIZEPALETTE=104,
   NUMRESERVED=106,
   COLORRES=108,
   /// <summary>
   /// 设备宽度???
   /// </summary>
   PHYSICALWIDTH=110,
   /// <summary>
   /// 设备高度???
   /// </summary>
   PHYSICALHEIGHT=111,
   PHYSICALOFFSETX=112,
   PHYSICALOFFSETY=113,
   VREFRESH=116,
   SCALINGFACTORX=114,
   SCALINGFACTORY=115,
   BLTALIGNMENT=119,
  }
欢迎像 zhchg6666 这样的师兄进入谢谢
谢谢 Koning 学长，可是这个我没太看懂，好长的一段代码，没发现有地方是定义 HBITMAP 的呵呵
我在vc里是这样定义的 HBITMAP hbitmap；然后使用GetObject(hbitmap, sizeof(bmap), &bmap);我想问，在C#中怎样写才可以使用 GetObject 这个方法？