28-12-2015 19:13:32 C# / Interop 0 Bookmark(s) 215 View(s)

 

[System.Runtime.InteropServices.DllImport("user32.dll", SetLastError = true, CharSet = System.Runtime.InteropServices.CharSet.Auto)]
public static extern int RegisterWindowMessage(string lpString);

[System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint = "SendMessage", CharSet = System.Runtime.InteropServices.CharSet.Auto)] //
public static extern bool SendMessage(IntPtr hWnd, uint Msg, int wParam, StringBuilder lParam);

[System.Runtime.InteropServices.DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr SendMessage(int hWnd, int Msg, int wparam, int lparam);

const int WM_GETTEXT = 0x000D;
const int WM_GETTEXTLENGTH = 0x000E;

public string GetWindowText(IntPtr hWnd)
{

    var titleBuffer = new StringBuilder();
    var length = SendMessage((int)hWnd, WM_GETTEXTLENGTH, 0, 0).ToInt32();
    if (length > 0)
    {
        titleBuffer = new StringBuilder(length + 1);
        SendMessage(hWnd, WM_GETTEXT, titleBuffer.Capacity, titleBuffer);
    }

    return titleBuffer.ToString();
}