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Declare a pointer to classX and initialize it to the address pointed by pClassZ (which is a member of classY).
Maybe it would be easier for you to understand, if we break it into multiple lines:
classX * pclassX; // declare a pointer
classZ * myPointerToZ = classY->pclassZ;
pclassX = (classX *) myPointerToZ;
I vote pro drink 
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classX * pclassX; // declare a pointer classZ * myPointerToZ = classY->pclassZ;
pclassX = (classX *) myPointerToZ;
Ok, but why not
classX * pclassX;
myPointerToZ = classY->pclassZ;
pclassX = myPointerToZ;
???
Why the "(classX *)" ?
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I assume that pclassZ is of type classZ* Since pClassX is of type classX*, you cannot assign pclassZ to pclassX without casting. They are different types; E.G.
char* pChar;
float* pFloat;
*pFloat = 1000.00;
pChar = (char*) pFloat; // OK (although not very wise)
pChar = pFloat; //Error
I vote pro drink
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(classX*) classY->pclassZ;
This is casting (like forcing) a type pclassZ to a type classX*.
A good example of this is with casting dialog controls from CWnd* types. CWnd::GetDlgItem(IDC) returns a CWnd*, and is cast as the type of control you are wanting to reference.
CListBox* pLB = (CListBox*)GetDlgItem(IDC_MY_LISTBOX_ID);
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Hello,
How is it possible to detect a tap anf hold in an edit box control ? I mean how to detect the
"tap" (stylus down) ? Once it's done, to determine if the stylus is hold, I think that calling
SHRecognizeGesture will be right. But the main problem is to determine that the user pressed the
stylus inside the control.
Indeed, the first time the edit control is selected, it generates a WM_NOTIFY with code EN_SETFOCUS
to the parent of the edit control, but once the edit control is selected and has the focus, tapping
inside it does not generate anything (no WM_LBUTTONDOWN, no BS_CLICK, ...)
Any idea ? Thank's in advance.
--Francois
francois_pessaux@yahoo.fr
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I believe that you are mistaken, a WM_xBUTTONDOWN message is sent for the proper button when the mouse button is pressed. You can investigate all of the messages that are sent to any window in any application by using Spy++ in the tools of your Dev Studio implementation.
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just wanted to say hello to everyone and that i'm new on these forums as well as very new to programming. i'm hoping that someday i won't be the one asking but answering the questions.
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You are welcome!!!
Cheers!!!
![Beer | [beer]](https://www.codeproject.com/script/Forums/Images/beer.gif)
Carlos Antollini.
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Welcome to the jungle. 
I vote pro drink
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Hi there,
I am having problem with a TreeCtrl that I have. As it stands, if I right click on the area passed a tree item, it will still think that i have clicked on the tree folder item or its text and provide the same context menu.
How do I force this thing to recognize whether it is clicking exactly on the treeview item text and folder or the blank area in front of it.
thanks
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Perform a hittest and then check if the flag is TVHT_ONITEMRIGHT which is to the right of the item
Bret Faller
Odyssey Computing, Inc.
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i'm usein mfc wizard with dialog based app. i put a msflexgrid control and managed to populate the first cell. i can't get the data to move down into the second row, it insists on remaining in the top row and when i try and add in a second piece of data for the next cell below it always takes the last data entry and replaces the first. can someone with more experience then i help please!!
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Hi,
I'm compiling Keywords to add to my XEmacs Syntax Highlighting... I added all the win32 basic types and am now wanting to add MFC Class names (like CTreeCtrl), however even google doesn't seem to know where to find a simple list of all classes... I don't really feel like copy and pasting, I prefer scripting the operation,....
does anyone know where to find a complete list that is copy-able?
-- Arjen
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Perl will do that in a pinch. 
foreach $a ( <C:\\msdev6\\vc98\\mfc\\include\\*.h> )
{
open HEADER, $a or die $!;
while ( <HEADER> )
{
print "$1\n" if /^class (\w+)/;
}
close HEADER;
}
--Mike--
http://home.inreach.com/mdunn/
You are the weakest link, GOODBYE!
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Hi.
What can I do to chenge Edit Box text color & BackGround color.
![Rose | [Rose]](https://codeproject.freetls.fastly.net/script/Forums/Images/rose.gif)
Iman Ghasr-e-fakhri
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In the parent of you Edit control, handle the WM_CTLCOLOREDIT, this will allow you to set the forground and background colors in the DC that will be used to paint the Edit control.
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In MS Word 97, when I drag any toolbar (such as drawing toolbar) and drop it on the main client window, it becomes a window with small title bar. It makes me surprised that when I click on a button on the toolbar, the cursor on MS Word window still blink and MS Word window is still active. Vice versus, when I type, the toolbar window is still active. I try to create a window like that by the API Fuction CreateWindowEx and set window style as WS_Ex_TOOLWINDOW, and its parent as another window;
However, this window becomes de-active when I click on its parent window. I wish to receive any explaination for this phenomenon. Thank you very much.
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Hi there,
I was wondering if there is anyway to disable a submenu in MFC.
Since you create a submenu by selecting "Popup" option under the menu item
and there are no IDs associated with this Popup menu, I am not sure how you can modify the menu.
thanks
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Are you saying that you want to have a menu with x number of sub menus but grey out the top level menu?
Ralph Krausse
www.consiliumsoft.com
Home of FastRun, the only application launcher that integrates itself into the taskbar!
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Try this code. x represents the number of the menu, zero based.
CMenu* pMenu = AfxGetMainWnd()->GetMenu();
pMenu->EnableMenuItem(x,MF_BYPOSITION|MF_GRAYED);
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The solution was published in Feb'99 issue of MSJ, in "C++ QA" column by Paul DiLascia. You may have this article in your MSDN, if not, it should be avialable online at msdn.microsoft.com.
Tomasz Sowinski -- http://www.shooltz.com
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Does anyone know of a shareware/freeware tool that will take my function, file, and class headers and make them into an HTML file? I get hooked on this ability w/ the DotNET beta 2 XML comment stuff, but here at work I'm still using 6.0 and I think we could really benefit from generating docs from our source code comments.
Thanks,
Bill
http://www.ratebeer.com
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Looks like exactly what I need, thanks a lot!
Bill
http://www.ratebeer.com
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Hi,
Previously, while running in debug, i was able to edit my code and select "Apply code changes" from the context menu in VC++.
For some reason this ability has stopped and all i seem to get is the option "Apply code Changes" greyed out!
Can explain this?
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