public void ApplyInternalPadding()
{
WinApi.RECT rc = new WinApi.RECT(2, 2, ClientSize.Width - 4, ClientSize.Height - 3);
WinApi.SendMessageRefRect(Handle, WinApi.EM_SETRECT, 0, ref rc);
}
protected override void WndProc(ref Message m)
{
// Send WM_MOUSEWHEEL messages to the parent
if (!MultiLines && m.Msg == 0x20a) WinApi.SendMessage(Parent.Handle, m.Msg, m.WParam, m.LParam);
else base.WndProc(ref m);
if ((m.Msg == WmPaint) || (m.Msg == OcmCommand)) {
// Apply a padding INSIDE the textbox (so we can draw the border!)
if (!_appliedPadding) {
WinApi.RECT rc = new WinApi.RECT(4, 2, ClientSize.Width - 8, ClientSize.Height - 3);
WinApi.SendMessageRefRect(Handle, WinApi.EM_SETRECT, 0, ref rc);
_appliedPadding = true;
} else {
using (Graphics graphics = CreateGraphics()) {
CustomPaint(graphics);
}
}
}
}