WPF sets Windows Forms to top window/foreground window at the frontend

The required function is to obtain the input focus of the textbox when the mouse slides over the textbox of the WPF form.

Steps:

1. Set the topmost attribute of WPF to true.

2. Reference Win32 API functions:

View code [Dllimport ( " User32.dll " )]
Private   Static   Extern   Bool Setforegroundwindow (intptr hwnd );

[Dllimport ("User32.dll")]
Private Static ExternIntptr setfocus (intptr hwnd );

2. Add the textbox mouseenter event

View code Private   Void Tbword_mouseenter ( Object Sender, mouseeventargs E)
{
Hwndsource Source = (Hwndsource) presentationsource. fromvisual ( This );
Intptr handle = Source. Handle;

Bool B1 = Bringwindowtotop (handle );
System. Threading. thread. Sleep ( 300 );

bool B = setforegroundwindow (handle);
system. threading. thread. sleep ( 100 );

tbword. focus ();
tbword. selectall ();
}

Program Demo: http://www.cnblogs.com/JimmyXiao/archive/2011/03/17/1987561.html