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 ExplicitPrivate Sub Command1_MouseDown(Button As Integer, Shift As Integer, x As Single, Y As Single) Label1 = ""
Label2 = ""End SubPrivate 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... [email protected]
'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 LongPublic 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 FunctionPrivate Function GetAddress(Address As Long) As Long GetAddress = AddressEnd FunctionPrivate 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
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 ExplicitPrivate Sub Command1_MouseDown(Button As Integer, Shift As Integer, x As Single, Y As Single) Label1 = ""
Label2 = ""End SubPrivate 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... [email protected]
'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 LongPublic 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 FunctionPrivate Function GetAddress(Address As Long) As Long GetAddress = AddressEnd FunctionPrivate 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
引用：http://www.vbdotcom.com/FreeCode.htm
Call Pointer Call any function using its pointer. Including functions in dlls (both stdCall and declSpec), VB functions using AddressOf and functions in COM objects including AddRef and Release.
代码下载：
ftp://www.vbdotcom.com/CallAnyFunctionByPtr.zip
或 http://www.vbgood.com/vbdelphi/down/CallAnyFunctionByPtr.zip
''form
Private Declare Function GetDC& Lib "user32" (ByVal hwnd As Long)
Private Declare Function ReleaseDC& Lib "user32" (ByVal hwnd As Long, ByVal hdc As Long)
Private Sub Command1_Click()
Dim a As Long, b As Long
Dim s() As Byte, x As Long, y As Long
s = StrConv("Hello !", vbFromUnicode)
b = 15
x = CallApiByName("user32", "SetWindowTextA", hwnd, VarPtr(s(0)))
Debug.Print "x= ", x
x = CallApiByName("kernel32", "RtlMoveMemory", VarPtr(a), VarPtr(b), 4&)
Debug.Print "a= ", a
x = CallApiByName("user32", "FlashWindow", hwnd, 1&)
Debug.Print "x= ", x
dc1 = GetDC(hwnd)
x = CallApiByName("user32", "GetDC", hwnd)
Debug.Print "x= ", x, "dc= ", dc1
x = ReleaseDC(hwnd, dc1)
End Sub
''bas
Option Explicit
''***********************************************
''* This module use excelent solution from
''* http://www.vbdotcom.com/FreeCode.htm
''* how to implement assembly calls directly
''* into VB code.
''***********************************************
Private Declare Function LoadLibrary Lib "kernel32" Alias "LoadLibraryA" (ByVal lpLibFileName As String) As Long
Private Declare Function GetProcAddress Lib "kernel32" (ByVal hModule As Long, ByVal lpProcName As String) As Long
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 Function FreeLibrary Lib "kernel32" (ByVal hLibModule As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (lpDest As Any, lpSource As Any, ByVal cBytes As Long)
Private mlngParameters() As Long ''list of parameters
Private mlngAddress As Long ''address of function to call
Private mbytCode() As Byte ''buffer for assembly code
Private mlngCP As Long ''used to keep track of latest byte added to code
Public Function CallApiByName(libName As String, funcName As String, ParamArray FuncParams()) As Long
Dim lb As Long, i As Integer
ReDim mlngParameters(0)
ReDim mbytCode(0)
mlngAddress = 0
lb = LoadLibrary(ByVal libName)
If lb = 0 Then
MsgBox "DLL not found", vbCritical
Exit Function
End If
mlngAddress = GetProcAddress(lb, ByVal funcName)
If mlngAddress = 0 Then
MsgBox "Function entry not found", vbCritical
FreeLibrary lb
Exit Function
End If
ReDim mlngParameters(UBound(FuncParams) + 1)
For i = 1 To UBound(mlngParameters)
mlngParameters(i) = CLng(FuncParams(i - 1))
Next i
CallApiByName = CallWindowProc(PrepareCode, 0, 0, 0, 0)
FreeLibrary lb
End Function
Private Function PrepareCode() As Long
Dim lngX As Long, codeStart As Long
ReDim mbytCode(18 + 32 + 6 * UBound(mlngParameters))
codeStart = GetAlignedCodeStart(VarPtr(mbytCode(0)))
mlngCP = codeStart - VarPtr(mbytCode(0))
For lngX = 0 To mlngCP - 1
mbytCode(lngX) = &HCC
Next
AddByteToCode &H58 ''pop eax
AddByteToCode &H59 ''pop ecx
AddByteToCode &H59 ''pop ecx
AddByteToCode &H59 ''pop ecx
AddByteToCode &H59 ''pop ecx
AddByteToCode &H50 ''push eax
For lngX = UBound(mlngParameters) To 1 Step -1
AddByteToCode &H68 ''push wwxxyyzz
AddLongToCode mlngParameters(lngX)
Next
AddCallToCode mlngAddress
AddByteToCode &HC3
AddByteToCode &HCC
PrepareCode = codeStart
End Function
Private Sub AddCallToCode(lngAddress As Long)
AddByteToCode &HE8
AddLongToCode lngAddress - VarPtr(mbytCode(mlngCP)) - 4
End Sub
Private Sub AddLongToCode(lng As Long)
Dim intX As Integer
Dim byt(3) As Byte
CopyMemory byt(0), lng, 4
For intX = 0 To 3
AddByteToCode byt(intX)
Next
End Sub
Private Sub AddByteToCode(byt As Byte)
mbytCode(mlngCP) = byt
mlngCP = mlngCP + 1
End Sub
Private Function GetAlignedCodeStart(lngAddress As Long) As Long
GetAlignedCodeStart = lngAddress + (15 - (lngAddress - 1) Mod 16)
If (15 - (lngAddress - 1) Mod 16) = 0 Then GetAlignedCodeStart = GetAlignedCodeStart + 16
End Function
比如 mov ax,00000001
那些机器码怎么记得住