Few Basic Questions!

[Cmania]

Hi Im a beginner in Windows Programming Enviroment Couldnt understand the reason for following:

1. Why are we suppossed to write WINAPI in WinMain declaration?
2. What is meant by CALLBACK?

See u soon!

Spread wat u Know!

[C Mahesh]

I think you should refer to MSDN. MSDN has lot of information on this.

[ShaluMalu]

Refer Charles Petzold Books on Windows Programming. It has a lot of basic information!

[Hamid Taebi]

See Callback [^]

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WhiteSky

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[Rajesh R Subramanian]

Cmania wrote:

Why are we suppossed to write WINAPI in WinMain declaration?

WINAPI is defined as __stdcall (Don't remember where it is declared, but I am sure). Here[^] is a nice article on calling conventions.

Cmania wrote:

2. What is meant by CALLBACK?

Read about callback functions here[^]

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Nobody can give you wiser advice than yourself. - Cicero ப்ரம்மா

[Cmania]

brahmma wrote:

WINAPI is defined as __stdcall (Don't remember where it is declared, but I am sure). Here[^] is a nice article on calling conventions

It was written in some book that is replaces FAR PASCAL. Is it a mere directive?

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[Rajesh R Subramanian]

Cmania wrote:

It was written in some book that is replaces FAR PASCAL.

True. From MSDN: The __pascal, __fortran, and __syscall calling conventions are no longer supported. You can emulate their functionality by using one of the supported calling conventions and appropriate linker options. WINDOWS.H now supports the WINAPI macro, which translates to the appropriate calling convention for the target. Use WINAPI where you previously used PASCAL or __far __pascal.

Cmania wrote:

Is it a mere directive?

From MSDN: WINAPI is Calling convention for system functions. This type is declared in WinDef.h as follows:

#define WINAPI __stdcall

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Nobody can give you wiser advice than yourself. - Cicero ப்ரம்மா

[Stephen Hewitt]

Both of there are macros that can be defined differently on different platforms so that the same source code can be used on each.

Steve