[RESOLVED] Form is a child of another form

How do you determine/test if a nonMDI form is the child of another nonMDI form?

I tried the following APIs but there is no difference in the return value, WS_ , WS_EX_ after the form was made a child (using SetParent).

GetWindowLong
IsChild
GetParent

Edit: GetWindow (.hwnd, GW_OWNER) doesn't work either

In Form1 someplace

Code:

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Form2.Show , Form1

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In Form2

Code:

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Option Explicit
Private Declare Function GetWindow Lib "user32" (ByVal hwnd As Long, ByVal wCmd As Long) As Long
Private Const GW_OWNER = 4


Private Sub Command1_Click()

Dim lngOwnerHwnd As Long
Dim frm As Form

lngOwnerHwnd = GetWindow(Me.hwnd, GW_OWNER)

For Each frm In Forms
    If frm.hwnd = lngOwnerHwnd Then
        MsgBox "My owner is " & frm.Name
        Exit For
    End If
Next

End Sub

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Quote:

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Originally Posted by MartinLiss

In Form1 someplace

Code:

---

Form2.Show , Form1

---

In Form2

Code:

---

Option Explicit
Private Declare Function GetWindow Lib "user32" (ByVal hwnd As Long, ByVal wCmd As Long) As Long
Private Const GW_OWNER = 4


Private Sub Command1_Click()

Dim lngOwnerHwnd As Long
Dim frm As Form

lngOwnerHwnd = GetWindow(Me.hwnd, GW_OWNER)

For Each frm In Forms
    If frm.hwnd = lngOwnerHwnd Then
        MsgBox "My owner is " & frm.Name
        Exit For
    End If
Next

End Sub

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Sorry I forgot to mention that I had already tried GetWindow GW_OWNER and it doesn't work either.

Whether or not form2 is made a child of form1 using SetParent(and you can tell when form2 is a child because it moves with form1 when form1 moves),

In both cases (form2 a child or not a child) GetWindow (form2.hwnd,GW_OWNER ) reports ThunderMain as the owner.

GOOD NEWS! I found it! use GetAncestor with GA_PARENT