I am trying to create a message box that allows you to enter a name
then display that name on a window. The program uses win32 but that is
not the issue. I want have a global buf variable. So that it can be
filled in the window then displayed in the main window.
Here is what I have
char * buf = NULL; //In my min program.
extern char * buf; // This is the section where I want buf displayed.
extern char * buf; //This is where I fill the array.
buf = new char[len];
GetDlgItemText( hwnd, IDC_NAME_EDIT, buf, len +1);
I have used extern before and it had made my progam possible but does
it work with a pointer?
2  2035 
"JoeC" <en*****@yahoo. com> wrote in message
news:11******** **************@ y43g2000cwc.goo glegroups.com.. . I am trying to create a message box that allows you to enter a name
then display that name on a window. The program uses win32 but that is
not the issue. I want have a global buf variable. So that it can be
filled in the window then displayed in the main window.
Here is what I have
char * buf = NULL; //In my min program.
extern char * buf; // This is the section where I want buf displayed.
extern char * buf; //This is where I fill the array.
buf = new char[len];
GetDlgItemText( hwnd, IDC_NAME_EDIT, buf, len +1);
I have used extern before and it had made my progam possible but does
it work with a pointer?
Yes, a pointer is just like any other variable. You can have a global
pointer and set the value of the pointer to whatever you want in another
module. That module has to have a extern declaration for the pointer. As a
general rule I have one extern declaration in one header and one definition
in one c/c++ file.
Not all globals are bad but whether you should use a global in this
particular case is a different question.
Andrew
andrew queisser wrote: "JoeC" <en*****@yahoo. com> wrote in message
news:11******** **************@ y43g2000cwc.goo glegroups.com.. .I am trying to create a message box that allows you to enter a name
then display that name on a window. The program uses win32 but that is
not the issue. I want have a global buf variable. So that it can be
filled in the window then displayed in the main window.
Here is what I have
char * buf = NULL; //In my min program.
extern char * buf; // This is the section where I want buf displayed.
extern char * buf; //This is where I fill the array.
buf = new char[len];
GetDlgItemText( hwnd, IDC_NAME_EDIT, buf, len +1);
I have used extern before and it had made my progam possible but does
it work with a pointer?
Yes, a pointer is just like any other variable. You can have a global
pointer and set the value of the pointer to whatever you want in another
module. That module has to have a extern declaration for the pointer. As a
general rule I have one extern declaration in one header and one definition
in one c/c++ file.
Not all globals are bad but whether you should use a global in this
particular case is a different question.
Andrew
At first it didn't work and now it does. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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