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

[shinaterry]

如题...

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

[greennetboy]

[DllImport("User32.dll")]
static extern IntPtr FindWindow(string lpClassName,string lpWindowName);
[DllImport("User32.dll")]
static extern int SendMessage(IntPtr hWnd,int msg,int wParam,ref int lParam);
用this.Handle得到当前窗口的Handle，然后传递给SendMessage IntPtr 参数，消息编号根据你需要使用的功能自己查阅

[superxiaomm]

也就是上面2个函数了

[shinaterry]

我也知道是用这两个函数。。。

但是我查不到他触发时的值是多少。。。

我调试过很久啦。。。

大家帮帮忙吧。。。

[shinaterry]

还有。。。
这个函数是这样用:
static extern int SendMessage(IntPtr hWnd,int msg,int wParam,ref int lParam);
还是这样子呢？
static extern int SendMessage(IntPtr hWnd,int msg,int wParam,int lParam);

[王集鹄]

//楼主分散了，别光给我一人...

using System.Runtime.InteropServices;

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);
#endregion

private 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);
}

[my_infinity]

首先你得标题栏的窗口句柄~~ 用FindWindow 和FindWindowEx 比较通用点
[DllImport("user32.dll")]
public static extern IntPtr FindWindow(string IpClassName, string IpWindowName);

[shinaterry]

TO：zswang(伴水清清)(专家门诊清洁工)

太感谢您的乐意帮助！而且为人还这么好！
希望以后还能继续得到您的指点！

还有！谢谢大家的支持...