How to Make Form "Snap" to the Screen Edge of Another Form?

How to Make Form "Snap" to the Screen Edge of Another Form?

• Hugo Soares

  Use this code to snap a form to the upper left corner of the main form:

  Form f1 = new Form();

  f1.StartPosition = FormStartPosition.Manual;

  f1.Location = new Point(this.Location.X, this.Location.Y);

  f1.Show();

  
  
  

• Stephie

  Khalid Ashraf wrote:

  Use this code to snap a form to the upper left corner of the main form: Form f1 = new Form(); f1.StartPosition = FormStartPosition.Manual; f1.Location = new Point(this.Location.X, this.Location.Y); f1.Show();

  
  
  How about just snapping it to the bottom of another window
  
  Thanks.
  
  

• WolfgangEngel

  Is the form you want to snap to a real Form that is owned by your application, or is it just a window In the first case, you might be able to avoid api calls. If you just mean snapping to any window, then you'll have to enumerate the windows.
  
  I actually did something like this quite a while ago in VB6 using subclassing, which in C# would be equivalent to overriding the WndProc method in the Form and intercepting the WM_MOVE message, probably.
  
  Another issue is if you want your snapped form to move when you move the other form. This would be very difficult if you do not own the other form, and cannot modify its code.
  
  

• Bunk

  Anyone has an idea to implement this
  
  Thanks.
  
  

• airwalker2000

  Thanks for reply.
  
  Yes. I do own all the the forms.
  
  It will not snap to other application that is running in Windows.
  
  I have main form and let say a child form. The child form will 'snap' to the main form when it is near to any of the borders of the main form.
  
  I would like to avoid using Windows API e.g. WndProc commands.
  
  Can it do it purely on C#
  
  Thanks!
  
  

• yog_23

  Thanks.
  
  But how to make it dock to any side of the form
  
  
  
  
• How to Make Form "Snap" to the Screen Edge of Another Form?