42 lines
1.6 KiB
C
42 lines
1.6 KiB
C
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//*****************************************************************************
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//
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// SUBCLASSING -
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//
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// Support for subclassing of 32bit standard (predefined) classes by
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// WOW apps.
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//
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//
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// 01-10-92 NanduriR Created.
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//
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//*****************************************************************************
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typedef struct {
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DWORD Proc16;
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DWORD Proc32;
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} THUNKWNDPROC, FAR *LPTHUNKWNDPROC;
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DWORD GetStdClassThunkWindowProc(LPSTR lpstrClass, PWW pww, HANDLE h32);
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DWORD IsStdClassThunkWindowProc(DWORD Proc16, PINT piClass);
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DWORD GetStdClass32WindowProc( INT iWOWClass ) ;
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#define THUNKWP_SIZE 0x30 /* Code size of a thunk */
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#define THUNKWP_BLOCK ((INT)(4096 / sizeof(TWPLIST))) /* Number of thunks per block */
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typedef struct _twpList {
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VPVOID vpfn16; /* 16-bit proc address */
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VPVOID vptwpNext; /* Pointer to next proc in the list */
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HWND hwnd32; /* 32-bit window handle */
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DWORD dwMagic; /* Magic identifier */
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INT iClass; /* Class of original proc */
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DWORD lpfn32; /* 32-bit proc address, 0 means available */
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BYTE Code[THUNKWP_SIZE]; /* Code for the thunk */
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} TWPLIST, *LPTWPLIST;
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#define SUBCLASS_MAGIC 0x534C4353 /* "SCLS" Sub-Class magic value */
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DWORD GetThunkWindowProc( DWORD Proc32, LPSTR lpszClass, PWW pww, HWND hwnd32 );
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BOOL FreeThunkWindowProc( DWORD Proc16 );
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void W32FreeThunkWindowProc( DWORD Proc32, DWORD Proc16 );
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DWORD IsThunkWindowProc( DWORD Proc16, PINT piClass );
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