Question

vb如何获取到窗口的句柄

如果我用getwindow找到窗口的hdc属性，但是我想要它的hwnd，怎么办呢？
求教。。

Answer 1

获取句柄不一定要用 FindWindow ，还可以枚举：

Private Declare Function GetWindow Lib "user32" (ByVal hwnd As Long, ByVal wCmd As Long) As Long
Private Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hwnd As Long, ByVal lpString As String, ByVal cch As Long) As Long

Private Const GW_HWNDFIRST = 0
Private Const GW_HWNDNEXT = 2

Private Sub Command1_Click()
Dim lngHwnd As Long, ret As Long
Dim s As String * 255
Dim sName As String

lngHwnd = GetWindow(Me.hwnd, GW_HWNDFIRST)
Do While lngHwnd
ret = GetWindowText(lngHwnd, s, 255)
sName = Blank(s)
If InStr(sName, "记事本") <> 0 Then '这里“记事本”替换成程序标题相同的部分
'这里写 将句柄加入数组的相关代码
End If
lngHwnd = GetWindow(lngHwnd, GW_HWNDNEXT)
Loop
End Sub

Public Function Blank(ByVal szString As String) As String
Dim l As Integer

l = InStr(szString, Chr(0))
If l > 0 Then
Blank = Left(szString, l - 1)
Else
Blank = szString
End If
End Function

Answer 2

GetWindow怎么会找到hdc呢？他的返回值就是hwnd啊。
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话说回来，如果你已知一个hdc想要找他的hwnd，用WindowFromDC函数。