请问C#里怎么用API函数SendMessage来显示标题栏的系统菜单???

Question

如题...不明白请查看:http://community.csdn.net/Expert/topic/5293/5293542.xml?temp=.3471643在线等待

Answer 1

const uint TPM_LEFTBUTTON = 0;
        const uint TPM_RIGHTBUTTON = 2;
        const uint TPM_LEFTALIGN = 0;
        const uint TPM_CENTERALIGN = 4;
        const uint TPM_RIGHTALIGN = 8;
        const uint TPM_TOPALIGN = 0;
        const uint TPM_VCENTERALIGN = 0x10;
        const uint TPM_BOTTOMALIGN = 0x20;        #region DllImport
        [DllImport("User32.dll")]
        static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);
        [DllImport("User32.dll")]
        static extern bool GetCursorPos(out Point lpPoint);
        [DllImport("User32.dll")]
        static extern bool TrackPopupMenu(IntPtr hMenu, uint uFlags,
            int x, int y, int nReserved, IntPtr hWnd, out Rectangle prcRect); 
        #endregion        private void button1_Click(object sender, EventArgs e)
        {
            Point vPoint;
            Rectangle vRect;
            GetCursorPos(out vPoint);
            TrackPopupMenu(GetSystemMenu(Handle, false),
                TPM_LEFTBUTTON, vPoint.X, vPoint.Y, 0, Handle, out vRect);
        }

Answer 2

问题已解决...非常感谢 zswang(伴水清清)(专家门诊清洁工) 的热心缓助...我先给分吧！但是我还有另外一个问题。希望你也能替我解决掉期待...地址:http://community.csdn.net/Expert/topic/5281/5281549.xml?temp=.5071985

Answer 3

如果要响应还得用:TPM_RETURNCMD = $100;ret = TrackPopupMenu(GetSystemMenu(Handle, false),
                TPM_RETURNCMD or TPM_LEFTBUTTON, vPoint.X, vPoint.Y, 0, Handle, out vRect);
SendMessage(Handle, WM_SYSCOMMAND, ret, 0);

Answer 4

const uint TPM_LEFTBUTTON = 0;
const uint TPM_RIGHTBUTTON = 2;
const uint TPM_LEFTALIGN = 0;
const uint TPM_CENTERALIGN = 4;
const uint TPM_RIGHTALIGN = 8;
const uint TPM_TOPALIGN = 0;
const uint TPM_VCENTERALIGN = 0x10;
const uint TPM_BOTTOMALIGN = 0x20;
const uint TPM_RETURNCMD = 0x100;
const uint WM_SYSCOMMAND = 0x0112;#region DllImport
[DllImport("User32.dll")]
static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);
[DllImport("User32.dll")]
static extern bool GetCursorPos(out Point lpPoint);
[DllImport("User32.dll")]
static extern int TrackPopupMenu(IntPtr hMenu, uint uFlags,
    int x, int y, int nReserved, IntPtr hWnd, out Rectangle prcRect);
[DllImport("User32.DLL")]
public static extern int SendMessage(IntPtr hWnd, uint Msg, int wParam, int lParam);
#endregionprivate void button1_Click(object sender, EventArgs e)
{
    Point vPoint;
    Rectangle vRect;
    GetCursorPos(out vPoint);
    SendMessage(Handle, WM_SYSCOMMAND, TrackPopupMenu(
        GetSystemMenu(Handle, false),
        TPM_RETURNCMD | TPM_LEFTBUTTON, vPoint.X, vPoint.Y, 
        0, Handle, out vRect), 0);
}