How to do a foreach in a ListBox control in Windows Form

Problem:

I need to loop using foreach to each elements of the ListBox control.

Solution:

Use the below code to loop using foreach

public void checkStock()
    {
        foreach (var listBoxItem in listBox1.Items)
        {
            // use the currently iterated list box item
            MessageBox.Show(string.Format("{0} is not in stock!",listBoxItem.ToString()));

        }
    }

How to add a tooltip in a button in Windows Form

Problem: 

I need to add a tooltip when the user hover the mouse over a button.

Solution:

Add a new “ToolTip” control to the form and the below code

private void Form1_Load(object sender, System.EventArgs e)
{
    System.Windows.Forms.ToolTip ToolTip1 = new System.Windows.Forms.ToolTip();
    ToolTip1.SetToolTip(this.textBox1, "Hello");
}

Windows Form – How to Transparent background Label over PictureBox

Question:

I need to put a label over a picture box in Windows Form with a transparent background.

Solution;

Add the below code inside the constructor

Point pos = this.PointToScreen(lbl.Location);
pos = pictureBox1.PointToClient(pos);
lbl.Parent = pictureBox1;
lbl.Location = pos;
lbl.BackColor = Color.Transparent;