我在获取滚动条位置时遇到问题。是否可以获取另一个进程的滚动条位置,例如记事本。我在我测试的地方写了一个小应用程序,总是得到0 0作为滚动条的位置。
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern int GetScrollPos(IntPtr hWnd, int nBar);
[DllImport("user32.dll")]
static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);
[DllImport("user32.dll")]
static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
[DllImport("user32.dll", SetLastError = true)]
private static extern bool MoveWindow(IntPtr hwnd, int x, int y, int cx, int cy, bool repaint);
[DllImport("user32.dll")]
static extern IntPtr SetActiveWindow(IntPtr hWnd);
[DllImport("user32.dll", SetLastError = true)]
static extern void SwitchToThisWindow(IntPtr hWnd, bool fAltTab);
private void Form1_Load(object sender, EventArgs e)
{
this.SuspendLayout();
Process notepad = new Process();
ProcessStartInfo psi = new ProcessStartInfo(@"c:\list1.txt");
psi.WindowStyle = ProcessWindowStyle.Normal;
notepad.StartInfo = psi;
notepad.Start();
this.ResumeLayout();
notepad.WaitForInputIdle(3000);
IntPtr old = SetParent(notepad.MainWindowHandle, this.Handle);
SetWindowLong(notepad.MainWindowHandle, GWL_STYLE, WS_VISIBLE + WS_MAXIMIZE);
MoveWindow(notepad.MainWindowHandle, 100, 100, 400, 400, true);
SetActiveWindow(notepad.MainWindowHandle);
SwitchToThisWindow(notepad.MainWindowHandle, true);
}
我有把PGDN事件发送到记事本的按钮,它工作得很好但滚动条的pgdn事件位置也是0 0
private void PGDN_Click(object sender, EventArgs e)
{
Process[] procs = Process.GetProcessesByName("Notepad");
IntPtr hwnd = procs[0].MainWindowHandle;
SetActiveWindow(hwnd);
SwitchToThisWindow(hwnd, true);
Thread.Sleep(2000);
SendKeys.SendWait("{PGDN}");
Thread.Sleep(2000);
label1.Text = "OK";
label1.Text = "";
label1.Text = HScrollPos().ToString() + " " + VScrollPos().ToString(); }
以下是HScrollPos和VScrollPos函数:
public int VScrollPos()
{
Process[] procs = Process.GetProcessesByName("Notepad");
IntPtr hwnd = procs[0].MainWindowHandle;
if (procs.Length != 0)
{
return GetScrollPos(hwnd , SB_VERT);
}
else
{
MessageBox.Show("Notepad Nor Running");
return 0;
}
}
public int HScrollPos()
{
Process[] procs = Process.GetProcessesByName("Notepad");
IntPtr hwnd = procs[0].MainWindowHandle;
if (procs.Length != 0)
{
return GetScrollPos(hwnd , SB_HORZ);
}
else
{
MessageBox.Show("Notepad Nor Running");
return 0;
}
}
也许还有另一种方法可以在Windows中获取另一个进程/窗口的滚动条位置?请帮忙。这是理所当然的。
这是基于答案的工作代码。 THX
[DllImport("user32.dll", SetLastError = true)]
private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);
private void button4_Click(object sender, EventArgs e)
{
string lpszParentClass = "Notepad";
string lpszParentWindow = "Untitled - Notepad";
string lpszClass = "Edit";
IntPtr ParenthWnd = new IntPtr(0);
IntPtr hWnd = new IntPtr(0);
ParenthWnd = FindWindow(lpszParentClass, lpszParentWindow);
if (ParenthWnd.Equals(IntPtr.Zero))
MessageBox.Show("Notepad Not Running");
else
{
hWnd = FindWindowEx(ParenthWnd, hWnd, lpszClass, "");
if (hWnd.Equals(IntPtr.Zero))
MessageBox.Show("Notepad doesn't have an edit component ?");
else
{
MessageBox.Show("Notepad Window: " + ParenthWnd.ToString());
MessageBox.Show("Edit Control: " + hWnd.ToString());
}
}
SetActiveWindow(ParenthWnd);
label5.Text = GetScrollPos(hWnd, SB_VERT) + " " + GetScrollPos(hWnd, SB_HORZ);
}
答案 0 :(得分:2)
我怀疑问题是你正在使用主窗口句柄,你应该使用Edit
控件的句柄,它是主窗口的子句。
使用主窗口hwnd,您可以enumrate the child windows找到编辑控件的hWnd,然后在调用中使用该hWnd来获取滚动条位置。
SendKeys正在工作,因为它将关键笔划发送到具有输入焦点的窗口,在这种情况下是Edit
控件。
Here是我在某个时候提供的问题的答案,如果你需要,它将有助于EnumChildWindows的互操作,还有更多,但它可能会有所帮助。