private void Form1_Load(object sender, EventArgs e)
{
Application.Idle += new EventHandler(Application_Idle);
}void Application_Idle(object sender, EventArgs e)
{
buttonCopy.Enabled = textBox1.SelectionLength > 0;
buttonCut.Enabled = textBox1.SelectionLength > 0;
buttonPaste.Enabled = Clipboard.ContainsText();
}
{
Application.Idle += new EventHandler(Application_Idle);
}void Application_Idle(object sender, EventArgs e)
{
buttonCopy.Enabled = textBox1.SelectionLength > 0;
buttonCut.Enabled = textBox1.SelectionLength > 0;
buttonPaste.Enabled = Clipboard.ContainsText();
}
解决方案 »
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