用WM_ACTIVATE消息不能使子窗口激活?

[XieWWW]

用SendMessage(
Self.MDIChildren[I].Handle,
WM_ACTIVATE,
WA_ACTIVE,
Self.MDIChildren[I].Handle)不能使子窗口激活,求助?

[cnhgj]

不要用self.mdichildren[i].handle
SendMessage(子窗体句柄,WM_ACTIVATE,WA_ACTIVE,子窗体句柄);

[lxpbuaa]

SendMessage(Self.MDIChildren[1].Handle,WM_ACTIVATE,WA_ACTIVE,0);

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