There isn't a point at Undo [nUndo]. All the points exist between 0 and nUndo - 1. You can correct this problem by decrementing nUndo prior to the Undo [nUndo] line. Also, since you are getting the top element off the undo stack, there is no need for that block of code shifting the undo stack down. After you get it working, look into std::deqeu. It would really simplify the code. Tim Smith I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

I've been trying for about an hour or so and I'm royally stuck. Basically I've got a class CShapePt. The program is like a mini paint utility. Whenever the user clicks on the client area it takes the point clicked. Then the next time he/she clicks it draws a line between the two places. The Array it was using was in the MainFrame Header file. I'm not exactally sure how to put the CShapePt object into the MainFrame header file so that the device context can access it. How do you do those code highlighter things? If you need some code to help you see what I'm having trouble explaining I'll be glad to put some snippets on here. Thanks. -CDudd

#define CWS_3DBORDER 0x01 //First bit of DWORD style is now used by child window style (CWS) //Create custom control window with custom style m_wndChild.Create(this, WS_CHILD | WS_VISIBLE | CWS_3DBORDER); //Custom control overloaded Create function CCustom::Create(CWnd* pParent, DWORD nStyle) { m_b3DBorder = nStyle & MASK; } //CCustom control OnPaint handler CCustom::OnPaint() { CPaintDC dc(this); if(m_b3DBorder) //Draw 3d border cuz it was specified in style flag //Continue with normal drawing code } You may have to give the and operation the once over I dunno how accurate my attempt at masking bits is in the above...but you should figure it out easily. I did try and give a solid example of how I would use custom flags. Cheers! "An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

An object is destructed when explicitly deleted or when it goes out of scope, if created on the stack. An object is also destructed when its containing object (if any) is destructed. This applies to implicitly constructed members of the containing class. Dynamically created members need to be explicitly deleted. /ravi "There is always one more bug..." http://www.ravib.com ravib@ravib.com

You're awesome I got the exercise working without a hitch! Thanks a ton man. -CDudd