I use Visual VC++ Express Edition.it seems that it doesn`t have MFC.so i used windows form application instead.i was going to create a form,put some bottoms on it and by clicking on the bottoms some lines and rectangle (that are used in drawing flowcharts) appear in the form in different positions.i create a class (with class wizard)and wrote codes for drawing this lines...i used these functions:
CClienttDC dc(this);
Cpen *pen1=dc.SelectStockObject(WHITE_PEN);
dc.lineto(50,50);
AND these are error messeges:
.\shekl.cpp(14) : error C2065: 'CClientDC' : undeclared identifier
.\shekl.cpp(14) : error C2146: syntax error : missing ';' before identifier 'dc'
.\shekl.cpp(14) : error C3861: 'dc': identifier not found
.\shekl.cpp(15) : error C2065: 'Cpen' : undeclared identifier
.\shekl.cpp(15) : error C2065: 'pen1' : undeclared identifier
.\shekl.cpp(15) : error C2228: left of '.SelectStockObject' must have class/struct/union
type is ''unknown-type''
.\shekl.cpp(15) : error C2065: 'WHITE_PEN' : undeclared identifier
.\shekl.cpp(16) : error C2228: left of '.lineto' must have class/struct/union
PLEASE HEEEEELP

drawing lines in windows forms application.
abstar
In the .NET (non MFC) world we’ve got the rather easy to use System.Drawing namespace which makes drawing to the screen quite easy... unfortunately for the life of me I cannot find a decent Managed C++ tutorial on it.
I would suggest taking a read of this excellent one (which sadly for you is in C#) and then once you’ve come to understand what is possible, take a look at this Managed C++ one or this one, sadly they don't go as in depth as the first, but will still get you going in C++.
StatlerW
The simplest way would be to change some state of your object so that it knows to draw a rectangle in its paint event handler in your click event handler followed by a call to Control.Invalidate to force the control to redraw. In the paint event handler you check if you should draw a rectangle, and if you should you draw it using for example Graphics.DrawRectangle.
Garyrg9
Can someone bring some example codes.i currently have built a form,and I put some bottoms on it,i want that when I click on the bottom a rectangle be drawn on the form.i know i should use an event but I don`t know which codes i should type in form.h.
private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) {
//what should I type here to draw a rectangle
}
pl
ease someone help me, I`m in a really bad situationSlim
To draw on a .NET control you normally add an event handler for its Paint event and do your painting in the event handler using the Graphics object you get from the event arguments.