private void ShitboxAlignVideoAudio_MouseMove(object sender, MouseEventArgs e) { if (!isDown) { return; } if (vclip == null) { return; } var dX = e.X - mouseX1; var dTs = dimdim.convert_AbsX2Seconds(dX); vclip.CustomAudioOffset = originalOffset + dTs; if (OffsetUpdated != null) { OffsetUpdated(vclip.CustomAudioOffset); } }