void FrmOMS_FormClosed(object sender, FormClosedEventArgs e)
{
if (sender is frmMainImage)
{
frmMainImage = null;
}
}
private void btmain_Click(object sender, EventArgs e)
{
if (frmMainImage == null)
{
frmMainImage = new frmMainImage();
frmMainImage.FormClosed += new FormClosedEventHandler(FrmOMS_FormClosed);
}
if (frmMainImage == null)
{
frmMainImage = new frmMainImage();
}
frmMainImage.Show(this.dockPanel2);
}