Window maximum and minimum settings

void MainWindow::gShowHideTaskBar(BOOL bHide)
{
RECT rectWorkArea;
RECT rectTaskBar;
RECT Rect;
GetWindowRect(::FindWindow(L"Shell_TrayWnd",NULL), &Rect); // <<— Note &
//::GetWindowRect(::FindWindow(L"Shell_TrayWnd",NULL), rectTaskBar);
HWND hTask;
hTask = ::FindWindow(L"Shell_TrayWnd",NULL);
if( bHide )
{
// Hide the specified progress bar
SystemParametersInfo(SPI_GETWORKAREA,
0,
(LPVOID)&rectWorkArea,
0);
rectWorkArea.bottom+=Rect.bottom-Rect.top;
// Make sure the window handle is valid
if(hTask)
{

        ::ShowWindow(hTask,SW_HIDE);
        // Reset mainwindow Window height 
        SystemParametersInfo(SPI_SETWORKAREA,
                             0,
                             (LPVOID)&rectWorkArea,
                             0);
        GlobalParams::getInstance()->setMainWindowSize(rectWorkArea.right-rectWorkArea.left,rectWorkArea.bottom-rectWorkArea.top);
        this->setFixedSize(rectWorkArea.right-rectWorkArea.left+1,rectWorkArea.bottom-rectWorkArea.top+1);
        ui->maxButton->hide();
        ui->minButton->hide();
        ui->closeButton->hide();

    }

}
else
{
    // Display the specified progress bar 
    SystemParametersInfo(SPI_GETWORKAREA,
                         0,
                         (LPVOID)&rectWorkArea,
                         0);
    if(hTask)
    {
        rectWorkArea.bottom-=Rect.bottom-Rect.top;
        SystemParametersInfo(SPI_SETWORKAREA,
                             0,
                             (LPVOID)&rectWorkArea,
                             0);
        this->showNormal();
        ::ShowWindow(hTask,SW_SHOW);
        GlobalParams::getInstance()->setMainWindowSize(rectWorkArea.right-rectWorkArea.left,rectWorkArea.bottom-rectWorkArea.top);
        // Maximize after normalization 
        this->setFixedSize(rectWorkArea.right-rectWorkArea.left,rectWorkArea.bottom-rectWorkArea.top);
        ui->maxButton->show();
        ui->minButton->show();
        ui->closeButton->show();
    }
}

}