[WinAPI] Problem ze zmianą stylu tekstu w richedit

LRESULT CALLBACK WindowProcedure( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
{
    switch( message )
    {
    case WM_CREATE:
        h_Rich = CreateWindowEx( WS_EX_CLIENTEDGE, "richedit", "", WS_CHILD | WS_VISIBLE | ES_MULTILINE, 25, 25, 450, 200, hwnd,( HMENU ) 100, h_Inst, 0 );
        SendMessage( h_Rich, EM_GETCHARFORMAT,( WPARAM ) SCF_DEFAULT,( LPARAM ) & chf_format );
        h_Button_Bold = CreateWindowEx( 0, WC_BUTTON, "Czcionka Impact", WS_CHILD | WS_VISIBLE, 25, 250, 150, 50, hwnd,( HMENU ) 1, h_Inst, 0 );
        h_Button_Italic = CreateWindowEx( 0, WC_BUTTON, "Czcionka Arial", WS_CHILD | WS_VISIBLE, 325, 250, 150, 50, hwnd,( HMENU ) 2, h_Inst, 0 )
        case WM_COMMAND
    : switch( wParam )
        {
        case 1:
            chf_format.dwMask = CFM_BOLD;
            chf_format.dwEffects = CFE_BOLD;
            SendMessage( h_Rich, EM_SETCHARFORMAT, SCF_ALL,( LPARAM ) & chf_format );
            break;
        case 2:
            chf_format.dwMask = CFM_ITALIC;
            chf_format.dwEffects = CFE_ITALIC;
            SendMessage( h_Rich, EM_SETCHARFORMAT, SCF_ALL,( LPARAM ) & chf_format );
            break;
        }
        break;
        //(...)
    }
   
    return 0;
}