I have MDI Form, I want to add Panel control to the MDIParent.
The problem is when I open MDI child, it always come behind the Panel in the MDIParent.

so if the panel is docked FILL then  I never see the MDIChild
Any Solution?

Your panel needs to be docked to any border so it becomes a sibling of the MDI client.

That indeed works. How do I implement a "splitter bar" to adjust the width of the panel, or do I need to write some code for that?

---Mike

I am also having doubts about the Splitter control being replaced by the SplitContainer control.  While it is so much easier to use the container in a regular form, when you're talking about a scenario like above (docked panels in an MDI container) the splitter does come in handy, since the SplitContainer would negate the MDI functionality. 

Theoretically, you can still access the splitter control through code (System...Forms.Splitter), but I'm wondering if it'll eventually disappear from the lineup? 

What would anyone's suggestion be regarding a RESIZABLE docked panel in an MDI container? 

Thanks,
Calin