Declare a class variable that will hold the value of the current form size, and set its value in the contructor.
Size curSize;
public Form1()
{
InitializeComponent();
curSize = this.Size;
}
To capture form size change, use the ClientSizeChanged event handler with the following code:
private void Form1_ClientSizeChanged(object sender, EventArgs e)
{
int heightDif = Size.Height - curSize.Height;
int widthDif = Size.Width - curSize.Width;
yourControlName.Height += heightDif;
yourControlName.Width += widthDif;
//store the current size until the next time this event is raised
curSize = this.Size;
}
