The compiler "knows" the sizes of all types that are native, or have been declared up to that point. It merely substitutes an integer constant in place of the sizeof expression at compile-time. Unless you're talking about reflection or RTTI (run-time type identification), all the size information is known at compile time, so there is no run-time involvement; just a simple substitution. Much like using a #define or a const.
is not working for all exceptions. If I put catch(...) it is ok but I cannot get the error message this way.
Do you know what I can put in the catch () so that I can handle all exceptions having their messages.
I'm trying to enable the SE_TCB_NAME privilage within the token of my process, but for some reason after the call to AdjustTokenPrivilages() GetLastError returns ERROR_NOT_ALL_ASSIGNED. My program is running in elevated mode so I can't understand why I am unable to set this.
The AdjustTokenPrivileges function cannot add new privileges to the access token. It can only enable or disable the token's existing privileges. To determine the token's privileges, call the GetTokenInformation function.
va_copy() is required in a function like vprintf (which is probably how printf is actually implemented on most systems:
int printf( const char* format, ... )
va_start( args, format );
ret = vprintf( format, args );
va_end( args );
but unlike vprintf, you need to traverse the va_list more than once. There is no portable way to restart the argument traversal process without the va_copy() macro.
In my program, I went ahead and wrote:
// This is exasperation driven because Visual Studio doesn't have it.
// IT MAY NOT ALWAYS WORK (although it is working in testing).
# define va_copy(dest,src) ((dest)=(src))
This may be confusing to a newbie to the subject, but if you program long enough, and you try to factor your code correctly, you're going to run into this situation.
I have a button with text and an icon drawn on it.
If the user changes some entry, I want to be able
to change the text and the icon. I can do this, however,
everything just jumbles on top of the button. How can
I erase the background of the button so that when I
put the new text and icon, it looks clean?
Please, any response any one can give me will be