how to generate uid for header files

[lakshman rao]

Hi, How to generate this type of number in header files? #if !defined(AFX_COL_H__1C5B8C95_F2A0_424C_9CAB_CCF5E76B642E__INCLUDED_) #define AFX_COL_H__1C5B8C95_F2A0_424C_9CAB_CCF5E76B642E__INCLUDED_

[Cedric Moonen]

They are usually generated automatically when you create a new class through the MFC wizard. On the other hand, you can perfectly attribute one yourself, usually the filename is used in someone (e.g. MYFILE_H). As long as the identifier is unique, its perfectly fine. You can also use the #pragma once directive which has been added in more recent compiler versions.

Cédric Moonen Software developer
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[CPallini]

To get new GUIDs you've to use guidgen tool, see here[^] for the steps required to run the tool from the Visual Studio IDE. :)

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[_Superman_]

The other replies must be good enough for you. Nevertheless, you can do this programmatically using APIs like UuidCreate, UuidCreateSequential etc.

«_Superman_»
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[yu jian]

But my visual studio do not output uid insteaded by "#pragma once" :-D

[lakshman rao]

Thank you! I thought there might be a way to generate the uid along with the header creation. In the above all replies we've to get uid separately and then append it to the header macro separately....