Enable DoubleBuffering for MdiClient

[=?Utf-8?B?bGpsZXZlbmQy?=]

Is there any way to enable double buffering in an MdiClient control? I have
a case where I need to hide all of the MdiClient forms and interactively draw
a custom background in an MdiClient control but without double buffering the
flicker is unbearable.

Thanks for any help!
Lance

[Linda Liu [MSFT]]

Hi Lance,

In my opinion, there may not be a way to enable double buffering for an
MdiClient control. The MdiClient class doesn't provide a method 'SetStyle'.

You have mentioned that the MdiClient control flickers when you
interactively draw a custom background in it. Do you paint the custom
background in the Paint event handler of the MdiClient? If so, I suggest
that you only paint the region that needs to paint, i.e. use the
ClipRectangle property of the PaintEventArgs parameter.

If the problem is still not solved, you may send me a simple project that
could just reproduce the problem. To get my actual email address, remove
'online' from my displayed email address.

Sincerely,
Linda Liu
Microsoft Online Community Support

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[=?Utf-8?B?bGpsZXZlbmQy?=]

Hi Linda,

Thank you for your feedback. In general I try to implement clipping as you
suggested, but in this case it is not possible because all drawn regions need
to update whenever the user changes one of the regions. In regards to
enabling double buffering do you know if there is an API method that could do
this for us?

Thanks again!
Lance

[Linda Liu [MSFT]]

Hi Lance,

Thank you for your reply.

I think it would be better to address this issue if you could send me a
simple project that could just reproduce the problem.

To get my actual email address, remove 'online' from my displayed email
address.

Thank you for your understanding and cooperation!

Sincerely,
Linda Liu
Microsoft Online Community Support

[=?Utf-8?B?bGpsZXZlbmQy?=]

Hi Linda,

Sorry, I should have explained that I use a considerable amount of internal
code for this part of my application. It would be fairly time consuming to
create a sample that excludes the code and still demonstrates the issue in a
way that gives you a sense for what I am doing.

Anyway, I looked into it some more and I came up with a way to get
everything to work. Thanks again for your help – it is always very much
appreciated!

Lance