vb中可以嵌套汇编语言吗?怎么做?

doubleyang 2003-05-07 09:14:01
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linchuanzai 2003-05-07
牛!这是很巧妙的一个方法!
但:
程序的可读性、可维护性太差!
结论:
不可取!
可以:
可以在c中直接嵌入汇编,当然不能用机器码啦,然后做成dll,vb调用。
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yefm 2003-05-07
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dyx 2003-05-07
来教你如何在vb里嵌入汇编!

本贴绝对值得你珍藏.

下面的例子完全用VB进行ASM编程的示例,本例获得CPU ID.

工程文件分为一个form1.frm 和一个模块module1.bas

----------------------form1.frm的源文件---------------------

VERSION 5.00
Begin VB.Form Form1
Caption = "Form1"
ClientHeight = 1965
ClientLeft = 60
ClientTop = 345
ClientWidth = 3105
LinkTopic = "Form1"
ScaleHeight = 1965
ScaleWidth = 3105
StartUpPosition = 2 'Bildschirmmitte
Begin VB.CommandButton Command1
Caption = "Get CPU Name"
Height = 495
Left = 840
TabIndex = 0
Top = 315
Width = 1425
End
Begin VB.Label Label2
Alignment = 2 'Zentriert
AutoSize = -1 'True
BeginProperty Font
Name = "MS Sans Serif"
Size = 9.75
Charset = 0
Weight = 400
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Height = 240
Left = 1515
TabIndex = 2
Top = 1065
Width = 60
End
Begin VB.Label Label1
Alignment = 2 'Zentriert
AutoSize = -1 'True
BeginProperty Font
Name = "Arial"
Size = 12
Charset = 0
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Height = 285
Left = 1515
TabIndex = 1
Top = 1350
Width = 75
End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

Private Sub Command1_MouseDown(Button As Integer, Shift As Integer, x As Single, Y As Single)

Label1 = ""
Label2 = ""

End Sub

Private Sub Command1_Click()

Label1 = GetCpuName() & " CPU"
Label2 = "You have a" & IIf(InStr("AEIOU", Left$(Label1, 1)), "n", "")

End Sub
------------------------------end---------------------------------





下面是modu1e.bas的源代码

----------------------module1.bas的源文件--------------------------
Option Explicit
'
'This shows how to incorporate machine code into VB
'''''''''''''''''''''''''''''''''''''''''''''''''''
'The example fills the array with a few machine instructions and then copies
'them to a procedure address. The modified procedure is then called thru
'CallWindowProc. The result of this specific machine code is your CPU Vendor Name.
'
'##########################################################################
'Apparently it gets a Stack Pointer Error, but I don't know why; if anybody
'can fix that please let me know... UMGEDV@AOL.COM
'The Error is not present in the native compiled version; so I think it got
'something to do with the P-Code Calling Convention (strange though)...
'##########################################################################
'
'Sub Dummy serves to reserve some space to copy the machine instructions into.
'
'
'Tested on Intel and AMD CPU's (uncompiled and compiled)
'
'
Private Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (lpvDest As Any, lpvSource As Any, ByVal cbCopy As Long)
Private x As Long

Public Function GetCpuName() As String

Dim MachineCode(0 To 35) As Byte
Dim VarAddr As Long
Dim FunctAddr As Long
Dim EAX As Long
Dim CPUName(1 To 12) As Byte

'set up machine code

MachineCode(0) = &H55 'push ebp

MachineCode(1) = &H8B 'move ebp,esp
MachineCode(2) = &HEC

MachineCode(3) = &H57 'push edi

MachineCode(4) = &H52 'push edx

MachineCode(5) = &H51 'push ecx

MachineCode(6) = &H53 'push ebx

MachineCode(7) = &H8B 'move eax,dword ptr [ebp+8]
MachineCode(8) = &H45
MachineCode(9) = &H8

MachineCode(10) = &HF 'cpuid
MachineCode(11) = &HA2

MachineCode(12) = &H8B 'mov edi,dword ptr [ebp+12]
MachineCode(13) = &H7D
MachineCode(14) = &HC

MachineCode(15) = &H89 'move dword ptr [edi],ebx
MachineCode(16) = &H1F

MachineCode(17) = &H8B 'mov edi,dword ptr [ebp+16]
MachineCode(18) = &H7D
MachineCode(19) = &H10

MachineCode(20) = &H89 'move dword ptr [edi],ecx
MachineCode(21) = &HF

MachineCode(22) = &H8B 'mov edi,dword ptr [ebp+20]
MachineCode(23) = &H7D
MachineCode(24) = &H14

MachineCode(25) = &H89 'move dword ptr [edi],edx
MachineCode(26) = &H17

MachineCode(27) = &H58 'pop ebx

MachineCode(28) = &H59 'pop ecx

MachineCode(29) = &H5A 'pop edx

MachineCode(30) = &H55 'pop edi

MachineCode(31) = &HC9 'leave

MachineCode(32) = &HC2 'ret 16 I tried everything from 0 to 24
MachineCode(33) = &H10 ' but all produce the stack error
MachineCode(34) = &H0

'tell cpuid what we want
EAX = 0

'get address of Machine Code
VarAddr = VarPtr(MachineCode(0))

'get address of Sub Dummy
FunctAddr = GetAddress(AddressOf Dummy)

'copy the Machine Code to where it can be called
CopyMemory ByVal FunctAddr, ByVal VarAddr, 35 '35 bytes machine code

'call it
On Error Resume Next 'apparently it gets a stack pointer error when in P-Code but i dont know why
CallWindowProc FunctAddr, EAX, VarPtr(CPUName(1)), VarPtr(CPUName(9)), VarPtr(CPUName(5))
'Debug.Print Err; Err.Description
'MsgBox Err & Err.Description
On Error GoTo 0

GetCpuName = StrConv(CPUName(), vbUnicode) 'UnicodeName

End Function

Private Function GetAddress(Address As Long) As Long

GetAddress = Address

End Function

Private Sub Dummy()

'the code below just reserves some space to copy the machine code into
'it is never executed

x = 0
x = 1
x = 2
x = 3
x = 4
x = 5
x = 6
x = 7
x = 8
x = 9
x = 10
x = 0
x = 1
x = 2
x = 3
x = 4
x = 5
x = 6
x = 7
x = 8
x = 9
x = 10

End Sub
------------------------------end--------------------------------------
摘自《vb情报站》 http://www.vbprobe.com/tips/showdoc.asp?detail_id=2064

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