//---negative image private void negativeToolStripMenuItem_Click(object sender, EventArgs e) { myImage.negative(); panel.Refresh(); if (histForm != null || histForm.IsDisposed == false) { myImage.HistCalculation(); histForm.getIndex = myImage; histForm.Refresh(); } if (gTransForm != null || gTransForm.IsDisposed == false) { myImage.HistCalculation(); gTransForm.getIndex = myImage; gTransForm.Refresh(); } }