Question

why are the structure declarations in assembly different from those in the win32 api documentation.(i am coming from c++ and trying my hand at assembly language)

for example i got this function prototype from icezelion’s tutorials(tutorial3)

WNDCLASSEX STRUCT DWORD
  cbSize            DWORD      ?
  style             DWORD      ?
  lpfnWndProc       DWORD      ?
  cbClsExtra        DWORD      ?
  cbWndExtra        DWORD      ?
  hInstance         DWORD      ?
  hIcon             DWORD      ?
  hCursor           DWORD      ?
  hbrBackground     DWORD      ?
  lpszMenuName      DWORD      ?
  lpszClassName     DWORD      ?
  hIconSm           DWORD      ?
WNDCLASSEX ENDS   

Hey wait…I know that “WNDCLASSEX” structure, in my offline version of the win32 api documentation, its declared as….

typedef struct _WNDCLASSEX {    // wc  
    UINT    cbSize; 
    UINT    style; 
    WNDPROC lpfnWndProc; 
    int     cbClsExtra; 
    int     cbWndExtra; 
    HANDLE  hInstance; 
    HICON   hIcon; 
    HCURSOR hCursor; 
    HBRUSH  hbrBackground; 
    LPCTSTR lpszMenuName; 
    LPCTSTR lpszClassName; 
    HICON   hIconSm; 
} WNDCLASSEX; 

Why is it that the asm version uses DWORD’s only contrary to what is in the win32 api documentation?
Am i using the wrong docs or what? and if i am can someone post me a download link for WIN32 api documentation meant for asm programmers?
Help, am confused.

Edited: Here is the link to the tutorial i was refering to:

iczelion’s win32 asm tutorial 3

Answer 1

DWORDS are a 32-bit type on 32-bit windows, as are all the types in the C version of the structure. The two are therefore compatible.