'winforms' tag RSSUsing the WM_NCPAINT and WM_NCCALCSIZE messages in order to create and paint a non-client region for a C# WinForms custom control
Entries tagged with 'winforms' Articles and information on C# and .NET development topics
A article which describes how to create a custom control that supports scrolling on a single axis.
The Windows Forms TextBox control doesn't offer an out of the box method for setting tabstops within the control,
this article describes how to achieve this via p/invoke.
An overview of how to use the IMessageFilter interface to intercept Windows Messages within your application.
A short article on adding text to an empty ListBox control.
A brief article showing how to display individual pages from a multi-page tiff file in the ImageBox control.
One of the nice things about the Visual Studio WinForms designers are the guidelines it draws onto design surfaces, aiding you in perfectly positioning your controls. These guidelines are known internally as snap lines, and by default each visual component inheriting from Control gets four of these, representing the values of the control's Margin property. However, this default designer doesn't include an implementation for the BaseLine snap line, which is used to align controls via their contained text. This article shows how to create a custom designer to allow your controls to easily include this alignment option.
Some weeks ago I was trying to make parts of WebCopy's UI a little bit simpler via the expedient of hiding some of the more advanced (and consequently less used) options. And to do this, I created a basic toggle panel control. This worked rather nicely, and while writing it I thought I'd write a short article on adding keyboard support to WinForm controls.
The ColorGrid control is a fairly useful control for selecting from a predefined list of colours. However, it can take up quite a bit of screen real estate depending on how many colours it contains. This article describes how you can host a ColorGrid in a standard ToolStrip control, providing access to both the ColorGrid and the ColorPickerDialog, with some custom painting to show the active colour on the button to round it off.
I was recently using a ComboBox control with the DropDownStyle set to Simple, effectively turning into a combined text box and list box.
However, when I wanted an action to occur on double clicking an item in the list I found that the control doesn't actually offer double click support. I suppose I should have just ripped out the combo box at that point and went with dedicated controls but instead I decided to extend ComboBox to support double clicks.