Wm_mdiactivate

Im trying to activate (bring to the forground / set acitve, whatever) an MDI Child form, based on its handle. sending the WM_MDIACTIVATE message to the MDIClient window (parent), using the setfocus api, using the setforgroundwindow api, all fail. How can I get this to work?

Try the ZOrder method.

VB Code:

MyForm.ZOrder

Here is some info on the message:

Quote:

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WM_MDIACTIVATE
An application sends the WM_MDIACTIVATE message to a multiple document interface (MDI) client window to instruct the client window to activate a different MDI child window. As the client window processes this message, it sends WM_MDIACTIVATE to the child window being deactivated and to the child window being activated.

WM_MDIACTIVATE
// Message sent to MDI client
wParam = (WPARAM) (HWND) hwndChildAct; // child to activate
lParam = 0; // not used; must be zero

// Message received by MDI child
hwndChildDeact = (HWND) wParam; // child being deactivated
hwndChildAct = (HWND) lParam; // child being activated

Parameters
In messages sent to an MDI client window:

hwndChildAct
Value of wParam. Handle to the MDI child window to be activated.
In messages received by an MDI child window:
hwndChildDeact
Value of wParam. Handle to the MDI child window being deactivated.
hwndChildAct
Value of lParam. Handle to the MDI child window being activated.
Return Values
If an application sends this message to an MDI client window, the return value is zero. An MDI child window should return zero if it processes this message.

Remarks
An MDI child window is activated independently of the MDI frame window. When the frame window becomes active, the child window last activated by using the WM_MDIACTIVATE message receives the WM_NCACTIVATE message to draw an active window frame and title bar; the child window does not receive another WM_MDIACTIVATE message.

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BringWindowToTop

Public Declare Function BringWindowToTop Lib "user32" (ByVal hwnd As Long) As Long


That works ...