在Windows窗体我需要改变文本框的焦点背景色。 我想这样做，每个文本框或控制的重点。
当焦点在这个文本框的背景色TextBox1中应该改变，现在我按Tab键，焦点转移到下一个文本框（TextBox2中）现在TextBox2中的背景色应该是变化和TextBox1的背景色应改回为默认颜色。
Answer 1:
在名为文本框的事件的GotFocus
Private Sub TextBox1_GotFocus(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles TextBox1.GotFocus
textbox1.backcolor = color.red
End Sub
在文本框的事件命名引发LostFocus
Private Sub TextBox1_LostFocus(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles TextBox1.LostFocus
textbox1.backcolor = color.white
End Sub
Answer 2:
看哪，C＃的解决方案：
//Properties declaration
private System.Drawing.Color NormalColor = System.Drawing.Color.FromArgb(50, 82, 110);
private System.Drawing.Color FocusColor = System.Drawing.Color.FromArgb(42, 65, 84);
// Else where in the Constructor
textBox_Username.Enter += EnterEvent;
textBox_Password.Enter += EnterEvent;
textBox_Username.Leave += LeaveEvent;
textBox_Password.Leave += LeaveEvent;
// Outside the Constructor
private void EnterEvent(object sender, EventArgs e)
{
if (sender is TextBox)
((TextBox)sender).BackColor = FocusColor;
}
private void LeaveEvent(object sender, EventArgs e)
{
if (sender is TextBox)
((TextBox)sender).BackColor = NormalColor;
}
文章来源: Change textbox BackColor on focus in a Windows application
