pop菜单需要使用也叫做
Public Declare Function TrackPopupMenuEx Lib "user32" Alias "TrackPopupMenuEx" (ByVal hMenu As Long, ByVal un As Long, ByVal n1 As Long, ByVal n2 As Long, ByVal hWnd As Long, lpTPMParams As TPMPARAMS) As Long
的函数跟踪,否则不会响应的。但是这只能对自己的程序(同一进程)有效。
如果你是要给另外的程序外挂一个菜单,请采用hook的方式添加并且需要截取窗体winproc函数的调用,判读所有菜单消息是否是自己添加得菜单消息。VB做起来相当的笨拙,一般采用C利用WIN API写DLL来做。
Public Declare Function GetMenu Lib "user32" (ByVal hWnd As Long) As Long
Public Declare Function GetSubMenu Lib "user32" (ByVal hMenu As Long, ByVal nPos As Long) As Long
Public Declare Function InsertMenu Lib "user32" Alias "InsertMenuA" (ByVal hMenu As Long, ByVal nPosition As Long, ByVal wFlags As Long, ByVal wIDNewItem As Long, ByVal lpNewItem As Any) As Long
Public Declare Function DeleteMenu Lib "user32" (ByVal hMenu As Long, ByVal nPosition As Long, ByVal wFlags As Long) As Long
Public 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
Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Public Const GWL_WNDPROC = -4
Public Const WM_COMMAND = &H111
Public Const MF_BYCOMMAND = &H0&
Public Const MF_BYPOSITION = &H400&
Public Const MF_STRING = &H0&
Public OldWndProc As Long
Public HookhWnd As Long
Public MyCreaMenu As Long
Public Sub Hook(hWnd As Long)
HookhWnd = hWnd
OldWndProc = SetWindowLong(HookhWnd, GWL_WNDPROC, AddressOf WindowProc)
End Sub
Public Sub UnHook()
Call SetWindowLong(HookhWnd, GWL_WNDPROC, OldWndProc)
End Sub
Public Function WindowProc(ByVal hWnd As Long, ByVal uMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Dim GetMsg As Boolean
Select Case uMsg
Case WM_COMMAND
If wParam = MyCreaMenu Then '看这里
MsgBox "动态创建的菜单"
GetMsg = True
End If
End Select
If GetMsg = False Then WindowProc = CallWindowProc(OldWndProc, hWnd, uMsg, wParam, lParam)
Private Sub Form_Unload(Cancel As Integer)
UnHook
Call DeleteMenu(FileMenuID, MyCreaMenu, MF_BYCOMMAND)
End Sub
Private Sub mnuExit_Click()
Unload Me
End Sub
'模块中:
Option Explicit
Public Declare Function GetMenu Lib "user32" (ByVal hWnd As Long) As Long
Public Declare Function GetSubMenu Lib "user32" (ByVal hMenu As Long, ByVal nPos As Long) As Long
Public Declare Function InsertMenu Lib "user32" Alias "InsertMenuA" (ByVal hMenu As Long, ByVal nPosition As Long, ByVal wFlags As Long, ByVal wIDNewItem As Long, ByVal lpNewItem As Any) As Long
Public Declare Function DeleteMenu Lib "user32" (ByVal hMenu As Long, ByVal nPosition As Long, ByVal wFlags As Long) As Long
Public 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
Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Public Const GWL_WNDPROC = -4
Public Const WM_COMMAND = &H111
Public Const MF_BYCOMMAND = &H0&
Public Const MF_BYPOSITION = &H400&
Public Const MF_STRING = &H0&
Public OldWndProc As Long
Public HookhWnd As Long
Public MyCreaMenu As Long
Public Sub Hook(hWnd As Long)
HookhWnd = hWnd
OldWndProc = SetWindowLong(HookhWnd, GWL_WNDPROC, AddressOf WindowProc)
End Sub
Public Sub UnHook()
Call SetWindowLong(HookhWnd, GWL_WNDPROC, OldWndProc)
End Sub
Public Function WindowProc(ByVal hWnd As Long, ByVal uMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Dim GetMsg As Boolean
Select Case uMsg
Case WM_COMMAND
If wParam = MyCreaMenu Then '看这里
MsgBox "动态创建的菜单"
GetMsg = True
End If
End Select
If GetMsg = False Then WindowProc = CallWindowProc(OldWndProc, hWnd, uMsg, wParam, lParam)
VB声明
Declare Function AppendMenu Lib "user32" Alias "AppendMenuA" (ByVal hMenu As Long, ByVal wFlags As Long, ByVal wIDNewItem As Long, ByVal lpNewItem As Any) As Long
说明
在指定的菜单里添加一个菜单项
返回值
Long,非零表示成功,零表示失败。会设置GetLastError
参数表
参数 类型及说明
hMenu Long,菜单句柄
wFlags Long,参考ModifyMenu函数中的菜单常数标志定义表,其中列出了允许使用的所有常数
wIDNewItem Long,指定菜单条目的新命令ID。如果在wFlags参数中指定了MF_POPUP字段,那么这应该是指向一个弹出式菜单的句柄
lpNewItem String(相应的vb声明见注解),如果在wFlags参数中指定了MF_STRING标志,这就代表在菜单中设置的字串。如设置了MF_BITMAP标志,这就代表一个Long型变量,其中包含了一个位图句柄。如设置了MF_OWNERDRAW,这个值就会包括在DRAWITEMSTRUCT和MEASUREITEMSTRUCT结构中,在条目需要重画的时候由windows发送出去
====================================================================
InsertMenu
VB声明
Declare Function InsertMenu Lib "user32" Alias "InsertMenuA" (ByVal hMenu As Long, ByVal nPosition As Long, ByVal wFlags As Long, ByVal wIDNewItem As Long, ByVal lpNewItem As Any) As Long
说明
在菜单的指定位置处插入一个菜单条目,并根据需要将其他条目向下移动
返回值
Long,非零表示成功,零表示失败。会设置GetLastError
参数表
参数 类型及说明
hMenu Long,菜单的句柄
nPosition Long,定义了新条目插入点的一个现有菜单条目的标志符。如果在wFlags中指定了MF_BYCOMMAND标志,这个参数就代表欲改变的菜单条目的命令ID。如设置的是MF_BYPOSITION标志,这个参数就代表菜单条目在菜单中的位置,第一个条目的位置为零
wFlags Long,一系列常数标志的组合。参考ModifyMenu
wIDNewItem Long,指定菜单条目的新菜单ID。如果在wFlags中指定了MF_POPUP标志,就应该指定弹出式菜单的一个句柄
lpNewItem 如果在wFlags参数中设置了MF_STRING标志,就代表要设置到菜单中的字串(String)。如设置的是MF_BITMAP标志,就代表一个Long型变量,其中包含了一个位图句柄
====================================================================
CreatePopupMenu
VB声明
Declare Function CreatePopupMenu Lib "user32" Alias "CreatePopupMenu" () As Long
说明
创建一个空的弹出式菜单。可用AppendMenu或InsertMenu函数在窗口中添加条目,或者为一个现成的菜单添加弹出式菜单,并在新建的菜单中添加条目
返回值
Long,如成功,返回一个菜单句柄;零意味着错误
====================================================================
DestroyMenu
VB声明
Declare Function DestroyMenu Lib "user32" Alias "DestroyMenu" (ByVal hMenu As Long) As Long
说明
删除指定的菜单。如菜单属于另一个菜单的一部分,或直接分配给一个窗口,那么菜单会在窗口清除后被自动删除
返回值
Long,非零表示成功,零表示失败。会设置GetLastError
参数表
参数 类型及说明
hMenu Long,欲删除菜单的句柄