Handle HWND Data Type

In VC ++ 6, right-click to go to definition and view HWND step by step

1,

1
HWND
2,
1
# Ifndef WIN_INTERNAL
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DECLARE_HANDLE (HWND); // <-Here
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DECLARE_HANDLE (HHOOK );
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# Ifdef WINABLE
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DECLARE_HANDLE (HEVENT );
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# Endif
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# Endif
3,

01
# Ifdef STRICT // # ifndef STRICT
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// # Define STRICT 1
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// # Endif
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Typedef void * HANDLE;
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# Define DECLARE_HANDLE (name) struct name ##__ {int unused;}; typedef struct name #__* name // <-Here
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# Else
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Typedef pvoid handle; // typedef void * PVOID;
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# Define DECLARE_HANDLE (name) typedef HANDLE name // <-Here
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# Endif
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Typedef HANDLE * PHANDLE;
Sort it out

Struct HWND __{

Int unused;

};

Typedef struct HWND _ * HWND; www.2cto.com

Therefore, HWND _ is an HWND _ pointer, and HWND _ is a struct containing an int-type data structure.

HWND is a void pointer only when STRICT is not defined.

PS: However, we don't know much about the undefined STRICT.

Author: TMDJoJo