formkeyboard.cs

用C#实现的数学常用函数的教学演示用程序．

		}

		private void button20_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button20.Text);			
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button24_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button24.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button17_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button17.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button21_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button21.Text);			
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button25_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button25.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button18_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button18.Text);			
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button22_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button22.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button26_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button26.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button19_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button19.Text);			
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button23_Click(object sender, System.EventArgs e)
		{			
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button23.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button33_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,"PI");
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button9_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button9.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button8_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button8.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button7_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button7.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button2_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button2.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button5_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button5.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button6_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button6.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button1.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button4_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button4.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button3_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button3.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button10_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button10.Text);			
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button11_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,".");			
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button27_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,"^");			
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button29_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button29.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button28_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button28.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button12_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button12.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button13_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button13.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button14_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button14.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		
		}

		private void button15_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,button15.Text);
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		

		private void button34_Click(object sender, System.EventArgs e)
		{		    
			this.Visible=false;	
			Form.form1.Activate();
			Form.form1.expressBox.Select();
		}

		private void button31_Click(object sender, System.EventArgs e)
		{
			if(expressBox.Text.Length>0)
				expressBox.Text=expressBox.Text.Remove(expressBox.Text.Length-1,1);
		}

		private void button32_Click(object sender, System.EventArgs e)
		{
			expressBox.Text="";
		}

		private void button30_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,"e");
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void button35_Click(object sender, System.EventArgs e)
		{
			expressBox.SelectedText=null;
			expressBox.Text=expressBox.Text.Insert(expressBox.SelectionStart,"x");
			expressBox.SelectionStart=expressBox.TextLength;
			expressBox.Select();
		}

		private void expressBox_TextChanged(object sender, System.EventArgs e)
		{
			Form.form1.expressBox.Text=this.expressBox.Text;
		}

		private void FormKeyBoard_MouseLeave(object sender, System.EventArgs e)
		{
			this.Visible=false;			
		}
		private void FormKeyBoard_Closed(object sender, System.EventArgs e)
		{			
			Form.keyboardWindowCreated=false;
			Form.form1.Activate();
		}		
	}
}