Some software If you don't enter the correct registration, the damn "next" button has been disable. This Disable button cannot be obtained using WindowFromPoint, FindWindowex.
However, using EnumChildWindows, getWindow can enumerate all controls in each window, including Disabled control, find the handle, we can operate
Test environment: WinXP VB6
Please refer to MSDN for specific API functions.
New project, add two buttons in Form, two text boxes. Where the button 2 Enabled attribute is False
FORM's CAPTION is set to "Activate the DISABLED button".
After compiling, run.
1. Let's first look at the use of getWindow enumeration
Let's find the FORM window with FindWindow, then find all the sub-control handles in the window, then use the enableWindow function to activate
Add 1 button, 2 List controls.
Option expedition
Private Declare Function FindWindow Lib "User32.dll" Alias "Findwindowa" (Byval LpwindownAme As String) AS LONG
Private Declare Function GetClassName Lib "User32" Alias "getclassnamea" (Byval HWnd As Long, Byval Nmaxcount As long) AS Long
Private Declare Function EnableWindow Lib "User32.dll" (Byval Hwnd As Long) AS Long
Private Declare Function GetWindow Lib "User32" (Byval Hwnd As Long) As long
Const GW_Child = 5
Const GW_HWndNext = 2
Const WM_Gettext = & HD
Const WM_ENABLE As Long = & HA
Private sub fascist2_click ()
DIM TWND AS Long
DIM BWND As Long
DIM LPCLASSNAME AS STRING
DIM RETVAL AS Long
DIM I as integer
DIM MNAME AS STRING
Twnd = FindWindow (VBnullString, "DISABLED of the Activation Program")
BWnd = getWindow (twnd, gw_child)
Do While BWND <> 0
LPClassName = Space (256)
'The name of the name here is mainly to see the control corresponding to the BWnd.
Retval = getClassName (BWnd, LPClassName, 256)
I = INSTR (1, lpclassname, chr (0))
MNAME = Left (LPClassName, I - 1)
List1.additem BWND & "& MNAME
List2 is mainly for convenient operation
List2.additem bwnd
'Continue to find the next control
BWnd = getWindow (bwnd, gw_hwndnext)
Loop
End Sub
'Click the handle you want to activate
Private sub list2_click ()
EnableWindow List2.List (List2.listIndex), TRUE
End Sub
Ok, after running, click the button, all the control handles in the window fill in the list box, then click the list box, you can find that the DISABLED button is activated, you can run it.
2. Enumerate using EnumChildWindows
Function function: an enumeration of the specified parent window
Private Declare Function EnumchildWindows lib "user32" alias "enumchildwindows" (Byval Hwndparent As Long, Byval LPARAM As long) As long
【Parameters Table】
HWndParent ----- Long, the handle of the parent window for the enumeration
LpenumFunc ----- long, a pointer to the function called for each sub-window. Get the address of the addressof operator in a standard module
code show as below:
window
Private Declare Function FindWindow Lib "User32.dll" Alias "Findwindowa" (Byval LpwindownAme As String) AS LONG
Private Declare Function EnableWindow Lib "User32.dll" (Byval Hwnd As Long) AS Long
Private Declare Function EnumChildWindows lib "user32" (Byval lPenumfunc as long, byval lparam as long) As long
Const WM_ENABLE As Long = & HA
Private submmand1_click ()
DIM TWND AS Long
Twnd = FindWindow (VBnullString, "DISABLED of the Activation Program")
EnumchildWindows Twnd, Addressof EnumchildProc, Byval 0 &
End Sub
Private sub list1_click ()
EnableWindow List1.List (List1.ListIndex), TRUE
End Sub
Module
Option expedition
Public Function EnumchildProc (Byval Hwnd As Long, BYVAL LPARAM AS Long) As long
Form1.List1.AddItem HWND
'Continue enumeration
EnumChildProc = 1
END FUNCTION
Ok, after running, click the button, all the control handles in the window fill in the list box, then click the list box, you can find that the DISABLED button is activated, you can run it.
