我正在做一个自动程序(C#,而不是C ++),我需要在表单中获得一个RichTextBox。我使用Spy++
来获取标题和类名,但FindWindowEx
始终找不到RichTextBox
,GetLastError
得到单词0
。然后这是一个简单的例子。
IntPtr parent = FindWindow(null, "Form1");
if (parent!=IntPtr.Zero) {
//find test1 textbox
IntPtr child = FindWindowEx(parent, 0,null, "test1");
if (child!=IntPtr.Zero) {
SendMessage(child, 0x000c, 0, lParam: "test");
} else {
Console.WriteLine("textbox can't be found");
}
//find test2 richtextbox
IntPtr childRich = FindWindowEx(parent, 0, null, "test2");
if (childRich != IntPtr.Zero) {
SendMessage(child, 0x000c, 0, lParam: "test");
} else {
Console.WriteLine("richtextbox can't be found");
}
} else {
Console.WriteLine("Form1 can't be found");
}
但结果是richtextbox can't find
。帮助我。
答案 0 :(得分:-1)
我并不认为这是最好的方法,但它确实存在。
对于这种特定情况,您可以在表单中搜索所有处理程序,然后更改所需的处理程序。
var iHandle = Win32.FindWindow(null, "Form1");
var allItems = Win32.GetAllChildrenWindowHandles((IntPtr)iHandle, int.MaxValue);
Win32.SendMessage(allItems[1], 0x000c, 0, lParam: "Now you can change the text!");
我已经测试过,allItems [1]将永远是同一个项目,我认为这是winForm从上到下排序的方式。
我在Win方法中使用了第二个类:
public class Win32
{
public const int WM_SETTEXT = 0X000C;
public static List<IntPtr> GetAllChildrenWindowHandles(IntPtr hParent, int maxCount)
{
var result = new List<IntPtr>();
int ct = 0;
IntPtr prevChild = IntPtr.Zero;
IntPtr currChild = IntPtr.Zero;
while (true && ct < maxCount)
{
currChild = FindWindowEx(hParent, prevChild, null, null);
if (currChild == IntPtr.Zero) break;
result.Add(currChild);
prevChild = currChild;
++ct;
}
return result;
}
[DllImport("user32.dll")]
public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);
[DllImport("User32.dll")]
public static extern int FindWindow(string strClassName, string strWindowName);
}
修改:获取所有子窗口句柄的方法:https://jamesmccaffrey.wordpress.com/2013/02/03/getting-all-child-window-handles-using-c-pinvoke-findwindowex/