你有装MASM32吗？在masm32\m32lib文件夹中有。a2dw.asm
; #########################################################################
; --------------------------------------
; This procedure was written by Iczelion
; --------------------------------------
.386
.model flat, stdcall
; 32 bit memory model
option casemap :none
; case sensitive
include \MASM32\INCLUDE\kernel32.inc
.code
; #########################################################################
a2dw proc uses ecx edi edx esi String:DWORD
;----------------------------------------
; Convert decimal string into dword value
; return value in eax
;----------------------------------------
xor ecx, ecx
mov edi, String
invoke lstrlen, String
.while eax != 0
xor edx, edx
mov dl, byte ptr [edi]
sub dl, "0" ; subtrack each digit with "0" to convert it to hex value
mov esi, eax
dec esi
push eax
mov eax, edx
push ebx
mov ebx, 10
.while esi > 0
mul ebx
dec esi
.endw
pop ebx
add ecx, eax
pop eax
inc edi
dec eax
.endw
mov eax, ecx
ret
a2dw endp
; #########################################################################
end
