查找窗口

Question

我試着去找到一個窗口上的特定進度（msctls_progress32）的值在一個特定的控制，

我已經找到了窗口：

[DllImport("User32.dll")] 
public static extern IntPtr FindWindow(string strClassName, string strWindowName); 

，但我不能讓該進度的指針有：

[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)] 
public static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string lclassName, string windowTitle); 

然後，一旦我有指針我想與價值：

public const int PBM_GETPOS = 0x0408; 
[DllImport("User32.dll")] 
public static extern Int32 SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam); 

的問題是，有窗口和進度條我想要的指針上的多個進度條在內部多＃32770（對話框）

Answer 1

我回答了這個問題，通過使用UIAutomation混合SendMessage和FindWindow

//Get parent window. 
AutomationElement element = AutomationElement.FromHandle(Win32.FindWindow(null, "Form1")); 
//Get all descendants 
AutomationElementCollection elements = element.FindAll(TreeScope.Descendants, Condition.TrueCondition); 
//loop through descendants 
foreach (AutomationElement elementNode in elements) 
{ 
    //if descendant is a progress bar 
    if (elementNode.Current.NativeWindowHandle != 0 && elementNode.Current.LocalizedControlType == "progress bar") 
    { 
     //Show value of the bar. 
     MessageBox.Show(Win32.SendMessage((IntPtr)elementNode.Current.NativeWindowHandle, Win32.PBM_GETPOS, IntPtr.Zero, IntPtr.Zero).ToString(), "Bar value"); 
    } 
}