Questions about grabbing windows and sending messages in C #

keith5556

A guy told me that in Win32, I can use Findwindow to grab a window, and SendMessage to send a message to the captured window. I ca n’t find these two functions in C #. Are they changed now? I thank you.

zorrozhou

No change, first declare

njuwelkin

Introduce winapi

zorrozhou

using System.Runtime.InteropServices;

[DllImport ("Uer32")]
        public static extern void Findwindow (String strClassName, String strWindowsName);

[DllImport ("Uer32")]
        public static extern int SendMessage (IntPtr hwnd, int wMsg, IntPtr wParam, IntPtr lParam);

zorrozhou

Wrong writing, yes
[DllImport ("user32.dll")]

keith5556

My question now is: the standard print dialog has an "OK" button. How do I grab this print dialog and send a message to it, which is equivalent to manually clicking the "OK" button? Thank you!

sinsin

zorrozhou() A friend wrote it right, but the parameters in the second SENDMESSAGE API can define multiple types of data types!