problem with custom control in design view

[arevans]

I created a custom control that inherits from textbox in a separate project (class library) in my solution. The custom control appears in the toolbox. I added a reference in my main project to the class library project. I can drag it to a form OK, but if I click away from it to another control, I can't click back. Yet, if I drag another control to the form, say a label, and then delete the label, focus jumps to my custom control again. Anybody know what is going on here?

Thanks,

arevans

 

[JurkMonkey]

How are you creating your custom textbox?

Did you create a UserControl or did you write a class that inherits from TextBox?

public class MyTextBox : System.Windows.Forms.TextBox

http://www.ubuntu.com/

 

[arevans]

I inherited from TextBox.

 

[arevans]

I figured it out. I was trying to build a numeric text box control with the code below. After I deleted it, it worked fine!

public override bool PreProcessMessage(ref Message msg)
{
Keys thisKey = (Keys)msg.WParam.ToInt32();
bool isNumber = ((thisKey >= Keys.D0 && thisKey <= Keys.D9) || (thisKey >= Keys.NumPad0 && thisKey <= Keys.NumPad9));
if (isNumber)
{
return false;
} // if
else
{
return true;
} // else
}

 

[JurkMonkey]

you should override the keydown event and set e.Cancel = true if you are trying to prevent the keystroke.

http://www.ubuntu.com/