Question

怎样获取当前窗口句柄？

怎样获取当前窗口句柄？

Answer 1

[DllImport("user32.dll", EntryPoint = "FindWindow", CharSet = CharSet.Auto)]
static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

/// <summary>
/// 获取有名字窗体句柄
/// </summary>
/// <param name="caption">窗体名</param>
/// <param name="delay">循环查询次数</param>
/// <param name="maxTries">停顿时间</param>
/// <returns>句柄 IntPtr</returns>
static IntPtr FindMainWindowHandle(String caption,int delay,int maxTries)
{
IntPtr mwh = IntPtr.Zero;
bool foundWindow = false;
int attempts = 0;

do
{
mwh = FindWindow(null, caption);
if (mwh == IntPtr.Zero)
{
Console.WriteLine("Form not yet found\n");
Thread.Sleep(maxTries);
++attempts;
}
else
{
Console.WriteLine("Form has been found");
foundWindow = true;
}
}
while(!foundWindow && attempts<delay);

if(mwh != IntPtr.Zero)
return mwh;
else
throw new Exception("Coule not find Main Window");

//调用FindMainWindowHandle()方法以获取窗体句柄,例:
IntPtr wHandle= FindMainWindowHandle("窗体名",10,100);
Console.WriteLine("窗体句柄: " + wHandle);

Answer 2

每一个从Cwnd类派生出来的类都有一个成员变量m_hWnd，即指向当前窗口的句柄，直接使用它即可。
其中从CWnd类派生出来的类有CFrameWnd、CDialog、CView、CControlBar等等。

Answer 3

HWND hWnd;
hWnd = ::FindWindow("窗口类名如：Dialog" , "要得到窗口的标题");

Answer 4

GetSafeHwnd();