WM_FORWARDMSG
WPARAM-DWORDdwUserData
LPARAM-LPMSGpMsg
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DWORD dwUserData (DWORD) wParam =
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LPMSG pMsg (LPMSG) lParam =
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LRESULT CMyWindow::OnMessage(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOLamp; bHandled)
{
MSG msg = {m_hWnd, uMsg, wParam, lParam, 0, {0, 0}};
LRESULT lRet = SendMessage (hWndOther, 0, (LPARAM) & msg);
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bHandled = FALSE;
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}