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Posts tagged with 'SendMessage'

Setting tab stops in a Windows Forms TextBox control

c# winforms SendMessage pinvoke textbox EM_SETTABSTOPS 2 Comments Downloads

I was adding a Wizard to one of my applications, and the final screen of this Wizard was a summary of the user's choices. I wanted the user to be able to copy this to the Clipboard if required, and so I'd used a TextBox rather than the ListView I might have otherwise used. However, this presented a minor issue as I'd chosen to use tabs to delimit the information, and the varying length of text meant that this wasn't aligned as expected.

Previously I have "dealt" with this issue by cheating - I'd just add extra tabs to force everything to line up. However, I do plan on fully localising this application at some point, not to mention that even using a different font could potentially trigger the text to misalign once more. And so I decided to do it properly this time.

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Specifying custom text when using the LabelEdit functionality of a TreeView

c# winforms api treeview SendMessage TVM_GETEDITCONTROL WM_SETTEXT pinvoke 0 Comments Downloads

Recently I was updating a support tool that displays documents in raw form and allows editing of them. This tool is centred around a TreeView, and the Text property of each TreeNode is a concatenation of a name and one or more values.

The problem with this approach is if you wish to allow the nodes to be edited using the built in functionality you're in trouble as by default you can't actually influence the text that appears in the in-line editor. In other applications of a similar nature I used owner-drawn trees as I was using different styles for the name and the value. In this case, I just wanted the standard look.

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