Move the Untitled (Border) Form

I have seen a tutorial on csdn before. It is very troublesome to move the Untitled form. We need to redraw the form continuously.
Using this formborderstyle to set the form to none, you can easily customize the form skin, of course, the skin needs to make your own picture.

Today, I accidentally discovered a simpleCode, Called the system API
The following code exists in program. CS:

[Dllimport ( " User32.dll " )]
Public   Static   Extern   Bool Releasecapture ();
[Dllimport ( " User32.dll " )]
Public   Static   Extern   Bool Sendmessage (intptr hwnd, Int Wmsg, Int Wparam, Int Lparam );

Public   Const   Int Wm_syscommand =   Zero X 0112 ;
Public   Const   Int SC _move =   0xf010 ;
Public   Const   Int Htcaption =   Zero X 0002 ;

Then, enter the following code on the form to implement the function:

Private   Void Frminputpsd_mousedown ( Object Sender, mouseeventargs E)
{
// If the mouse pointer is within the range of the title bar and the left mouse button is pressed, the method of moving the title bar is triggered.
If (E. Button = Mousebuttons. Left && E. Y <=   25 )
{
Program. releasecapture ();
Program. sendmessage (This. Handle, program. wm_syscommand, program. SC _move+Program. htcaption,0);
}
}