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TabControl ItemSize with TabPage ImageKey

I have a TabControl where I want to keep the tabs to a fixed size and I want icons in the tabs. I have set TabControl.SizeMode = Fixed and TabControl.ItemSize = 100, 18. I have also set TabControl.ImageList and am assigning images to the tabs via TabPage.ImageKey.
Here is what it looks like if I comment-out assigning the ImageKey:
And here is what it looks like if I am assigning the ImageKey:
Is there some sort of "alignment" for the icons? I want them to be on the far left in the blank space, but instead they are starting where the text starts. Any suggestions?
(BTW - if I set TabControl.SizeMode = Normal, I get the tab content the way I want it, but the tabs aren't a fixed size):

I can verify the issue that you are seeing with TabControl.SizeMode = Fixed (on Windows 10). I initially seen it in the designer when configuring a TabPage with an icon. However the irritating thing is that the issue corrected itself if the designer is closed and reopened. This suggests a window style setting of some sort and there are some Tab Control Styles set in the CreateParams Property based on the SizeMode Property. However, I found no solution in attempting to apply the TCS_FORCEICONLEFT style. If the ImageIndex property is set prior to the control being shown, then the alignment is as desired. So I figured that there must be something being configured on handle creation.
If you call the form's RecreateHandle method after setting the TabPage.ImageIndex property, the form redraws and all looks good. However this cause the form to blink. Calling the Control.RecreateHandle method on the TabControl also works. This is a protected method and would necessitate using a derived TabControl to expose the method or you could use Reflection to invoke the method.
public class MyTC : TabControl
{
public void FixIcon()
{
RecreateHandle();
}
}

UserControl inside Panel inside UserControl not working

I am having some trouble creating the template of my application :
I am making some dynamic parts of forms and I use a panel in which I include my User Control according to the choice of the user. The panel has the same size as the user control but it doesn't work at runtime. The panel in which the UC is included is inside another UC also.
I tried autoSize = true, fixed size and many things but I don't know why it goes like this. Any idea?
Some parts of my code to load the User Control :
UC_panel.Controls.Clear();
UC_ADDRESS uca = new UC_ADDRESS();
uca.Dock = DockStyle.Fill;
uca.AutoSize = true;
UC_panel.Controls.Add(uca);
My UserControl for the address
At runtime it goes bigger

Since you set
uca.Dock = DockStyle.Fill;
and also
uca.AutoSize = true;
(which is redundant)
it is possible that some other container has its AutoScaleMode set to Font and its font size is bigger.

WPF Animate Grid.VisibilityProperty in code

What animation class would allow me to change the Visibility (not opacity) of a Grid object with a Storyboard instance in code (not XAML)?
So that I can set the to, from, and duration properties before adding it to the storyboard.

You can use an ObjectAnimationUsingKeyFrames with some DiscreteObjectKeyFrame.
You can find an example here. The only work to do is translating that to C# code. (Which shouldn't be a huge problem.)

This is the code necessary to animate the visibility.
DiscreteObjectKeyFrame dk;
ObjectAnimationUsingKeyFrames ok;
ok = new ObjectAnimationUsingKeyFrames();
dk = new DiscreteObjectKeyFrame();
Storyboard.SetTarget(ok, myGrid);
Storyboard.SetTargetProperty(ok, new PropertyPath(Grid.VisibilityProperty));
dk.KeyTime = TimeSpan.FromSeconds(0.1);
dk.Value = Visibility.Hidden;
ok.KeyFrames.Add(dk);
sb.Children.Add(ok);

c# WinForms can you get the NumericUpDown text area

Is it possible to get the text area of a NumericUpDown control? I'm looking to get it's size so that I can mask it with a panel. I don't want the user to be able to edit AND select the text. Is this possible? Or is there another way of covering up the text in the text box?
Thanks.

You can get this by using a Label control instead of the baked-in TextBox control. Add a new class to your project and paste the code shown below. Compile. Drop the new control from the top of the toolbox onto your form.
using System;
using System.Windows.Forms;
class UpDownLabel : NumericUpDown {
private Label mLabel;
private TextBox mBox;
public UpDownLabel() {
mBox = this.Controls[1] as TextBox;
mBox.Enabled = false;
mLabel = new Label();
mLabel.Location = mBox.Location;
mLabel.Size = mBox.Size;
this.Controls.Add(mLabel);
mLabel.BringToFront();
}
protected override void UpdateEditText() {
base.UpdateEditText();
if (mLabel != null) mLabel.Text = mBox.Text;
}
}

If you want do disallow manual editing, you can just set ReadOnly property to true.
updown.ReadOnly = true;
If you want to disallow selecting too (I wonder why you need this), you can use reflection. I don't think there's better way, because the field upDownEdit is internal field of UpDownBase.
FieldInfo editProp = updown.GetType().GetField("upDownEdit", BindingFlags.Instance | BindingFlags.NonPublic);
TextBox edit = (TextBox)editProp.GetValue(updown);
edit.Enabled = false;

Set the ReadOnly property to true, that's all.

The 'proper' way to do this is to create an Up-Down control and a Label (the label can't be selected or edited). However, the authors of Windows Forms, in their infinite wisdom, have decided that we don't need the Up-Down control and so they didn't provide a .NET wrapper for one. They decided that the only reason we could ever want an Up-Down control is when paired with a TextBox control.
The Up-Down control is simple enough to create a light wrapper if you want to go this route: http://msdn.microsoft.com/en-us/library/bb759880.aspx
Edit 1
[snip]
Edit 2
I blogged about it here: http://tergiver.wordpress.com/2010/11/05/using-the-up-down-control-in-windows-forms/

Set a disabled TextBox's ForeColor to be the same as its BackColor in C#

How do I set a disabled TextBox's current text color to be the same as its current background color in C#?
Simply doing txtLala.ForeColor = txtLala.BackColor does not seems to work.

This works:
txtLala.Text = "Red";
txtLala.BackColor = System.Drawing.Color.Red;
txtLala.ForeColor = txtLala.BackColor;
txtLala.ReadOnly = true;
Try setting the color, before the readonly. And also check how you are setting the color!
EDIT
Try this
txtLala.Attributes.Add("style","background-color:Red;color:Red");
If you are trying to make it invisible, you know you can set it as
txtLala.Visible = False;
EDIT II
I finally tried
txtLala.Enabled = false;
... you see that grey shadow color! I don't think you can mess with that, it looks to be a browser property setting.
Why not set as ReadOnly or Visible = False?
Maybe you have a good reason for Enabled = false
But you should note:
Use the Enabled property to specify or determine whether a control is functional. When set to false, the control appears dimmed, preventing any input from being entered in the control.
Note The ability to enable or disable functionality is always available. However, dimming and locking the control only works in Microsoft Internet Explorer version 4 and later.
This property propagates down the control hierarchy. Therefore, disabling a container control will disable all child controls within that container.
Note Not all controls support this property. See the indivual controls for details.

It seems to only work for TextBox that is read only. If it is disabled (.Enabled = false). It does not seems to work.

If this is a readonly textbox, you need to explicitly set your BackColor first, then your statement will work.
txtLala.BackColor = System.Drawing.SystemColors.Info;
txtLala.ForeColor = txtLala.BackColor;
Ref: http://bytes.com/groups/net-c/233961-read-only-textbox
Then again, if it's readonly, a label might be better. If you're trying to hide it, perhaps setting .Visible = false would be better still.
Edit: This seems to be a common question on the web. With respect to winforms: This site suggests dropping the box into a frame and setting Enabled = false on the frame, not the textbox. Once you do that, you may be able to maintain control of the forecolor.