Introduction

When I had to use the flexgrid for the first time, I was too frustrated to 
find out that no proper documentation existed on the net. The ones available 
were too complicated for me to understand. And the ones that were easy were in 
VB. This article is to help persons who are going to use the flexgrid in their 
applications using VC++. Also take a look at the Warning note at the end of this 
article. 

Implementation

Step 1

First, include the msflexgrid control in the project. To do that :-

1. In the VC++ IDE Menu, go to Project->Add To Project->Components and Controls menu.
2. Then , in the dialog box that appears, select Registered ActiveX Controls.
   There, You can see a control named "Microsoft Hierarchical FlexGrid Control...".
3. Select that and add it to your project using the Insert button. You can
   now see the FlexGrid control in the resource editor's CONTROLS toolbar.


4. Add it to your dialog as you add a control usually.

Step 2

Then, set the properties as you want it to be. Right click on the grid and select the Properties option.
Change the settings there as per your requirements.

Step 3

Add a member variable for that grid. E.g. m_Grid. The sample given below is for an example.
Use it as a guideline to make your application.

Step 4

Its better to clear the flexgrid before you do any operations on it. To do that, use :-

m_Grid.Clear();

Step 5

To add records to the Grid, use something like this.

CString strName,strRemarks;

m_nCount = 0;

// Clear and refresh the grid   
m_Grid.Clear();
m_Grid.Refresh();

// Get the value for strName from the database here 
// Get the strRemarks from the database here

m_nCols = m_Grid.GetCols();
m_Grid.SetTextArray(0, "Name " );      // First  Column
m_Grid.SetTextArray(1, "Remarks " );   // Second  Column

m_nCount++;

// Fill First Column 
m_Grid.SetTextArray(  m_nCols * m_nCount + 0,strName );      
// Fill Second  Column
m_Grid.SetTextArray(  m_nCols * m_nCount + 1, strRemarks );  

// Redraw the grid
m_Grid.SetRedraw(TRUE);
m_Grid.Refresh();

Step 6

To retrieve data from the Grid when the user double clicks on a record, add a 
double click message handler for the grid using the class wizard. Assuming that 
you have named the function as OnDblClickGrid, then :-

void YourDialog::OnDblClickGrid()
{
    // Get the current row and column
    int nRow = m_Grid.GetRow();
    int nCol = m_Grid.GetCol();

    CString strName,strRemarks;

    // Get data from the First Column
    strName    =  m_Grid.GetTextMatrix(nRow,nCol+0);    
    // Get data from the Second Column
    strRemarks =  m_Grid.GetTextMatrix(nRow,nCol+1);    
}

Step 7

To move to the previous record, do this :-

void YourDialog::OnBtnPrevious()
{
    m_Grid.SetRedraw(FALSE);

    // Get the current selection

    int NextRow = m_Grid.GetRowSel();

    // If the position is at the last record, return
    if(NextRow <= 1)
    {
        return;
    }
    else
    {
        long BackColor[2],FontColor[2];

        int Column;

        // The BackColor and the FontColor variables 
        // are manipulated because we want a 
        // selected effect to be given to the previous
        // record. Here, we are merely changing 
        // the color of the selected
        // row to give it that effect.

        BackColor[0] = 0x00FFFFFF;
        BackColor[1] = 0x00FFFFB0;

        FontColor[0] = 0x00400000;
        FontColor[1] = 0x000000FF;

        for(Column = 1; Column < m_Grid.GetCols(); Column++)
        {
            m_Grid.SetCol(Column);
            m_Grid.SetCellBackColor(BackColor[0]);
            m_Grid.SetCellForeColor(FontColor[0]);
        }


        m_Grid.SetRow(--NextRow);

        for(Column = 1; Column < m_Grid.GetCols(); Column++)
        {
            m_Grid.SetCol(Column);
            m_Grid.SetCellBackColor(BackColor[1]);
            m_Grid.SetCellForeColor(FontColor[1]);
        }

        m_Grid.Refresh();
        m_Grid.SetRedraw(TRUE);
    }
}

Step 8

To got to the Next record, do the reverse of the code above. Instead of m_Grid.SetRow(--NextRow)
it would be m_Grid.SetRow(++NextRow).

Warning

Whenever you use a flexgrid in your application, you have to be twice as 
careful. Be sure to take regular backups. Sometimes, you might note that your 
compilation time is too longer than usual. It would be more and more slow with 
each build. If you feel so, check the size of your .rc file. If its size is 
abnormal ( I cant specify a size because it depends on your project and its 
resource contents ),then delete the flexgrid from your application , Close 
Visual Studio and copy the .rc file from your backup. Open your project again. 
That should solve your problem. I'm not sure why this happens, maybe its a bug 
in flexgrid that corrupts or damages it. But from your side, be careful. 
Conclusion
The flexgrid is a very easy control to use. But whenever you use it , repeat 
the mantra "take backups of your .rc file regularly" until it becomes a 
habit. That's it. All luck and have a great time.