__________?

It might be Hungrarian notatation. It could also be message crackers but they aren''t classes. Most likely its just part of the name.

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I don't think that has anything to do with notation, because when i put the mouse over some variable in vc++ the tool tip says: "__hbrush" instead "hbrush".

Edited by - Tiso on October 1, 2000 5:24:29 PM

It's just part of the name. For example, if I were using straight C, and making a struct, I might type this:

typedef struct _bullet
{
float x, y;
} bullet, *pbullet;


In that example, the actual struct name has an underscore, but the typedef has a bullet. C doesn't create types unless you typedef them (C++ does).

Also, it's customary to begin the names of obsolete functions with an underscore (such as _lread() ), or keywords that are compiler specific, or were compiler specific at one time (like _asm or _declspec), and also, many times global macros will be named with an underscore, so they don't interfere with your macro/function names (like _CrtDumpMemoryLeaks).

The underscores have nothing to do with the language, they're just part of the name of the variable, function, or type.

Edited by - Qoy on October 1, 2000 12:43:24 AM

Thanks I''ve been waiting for an anwser all day, gota go to sleep now.

it has nothing (directly) to do with hungarian notation

the first decl (IDD_Ixxx) is the constant ID of the com object(used to register it in the windoz reg),
while the second (Ixxx) is the interface to that com object

they differ significantly in use





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