We use cookies to give you the best experience on our website. If you continue to browse, then you agree to our privacy policy and cookie policy. Image for the cookie policy date
Unfortunately, activation email could not send to your email. Please try again.
Syncfusion Feedback

How to make the popup resizable?

Platform: WinForms |
Control: PopupControlContainer


Set the FormBorderStyle of the PopupControlContainer’s parent form to the appropriate style.

Do that in the PopupControlContainer’s BeforePopup event handler. You have to do this as late as in the BeforePopup event handler because this is the earliest the PopupHost will be non-NULL.


private void colorUIPopup_BeforePopup(object sender, System.ComponentModel.CancelEventArgs e)


    // Make the popup host's border style resizable.

    this.colorUIPopup.PopupHost.FormBorderStyle = FormBorderStyle.SizableToolWindow;

    this.colorUIPopup.PopupHost.BackColor = this.BackColor;

   // Necessary to set the host's client size every time, especially since the popup's Dock style is set to DockStyle.Fill.

   if(this.colorUIPopup.PopupHost.Size.Width < 160)     this.coloruipopup.popuphost.size = new system.drawing.size(160, 176);

   // so that the popup container will fill the entire popup host when resized.

   this.coloruipopup.dock = dockstyle.fill;


2X faster development

The ultimate WinForms UI toolkit to boost your development speed.
You must log in to leave a comment

Please sign in to access our KB

This page will automatically be redirected to the sign-in page in 10 seconds.

Up arrow icon

Warning Icon You are using an outdated version of Internet Explorer that may not display all features of this and other websites. Upgrade to Internet Explorer 8 or newer for a better experience.Close Icon

Live Chat Icon For mobile