Using datagridview AdjustCellBorderStyle function to change border color

Hello everyone.

I'm having a hard time trying to do anything with the dataGridView border. Id like to chang its color and shape of a two different cells using Visual c++ and making a Windows form application.

Code:

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        DataGridViewAdvancedBorderStyle^ dgv1ph;
        DataGridViewAdvancedBorderStyle^ dgv1i;
        dgv1ph->Right = DataGridViewAdvancedCellBorderStyle::OutsetDouble;

        this->dataGridView1->Rows[1]->Cells[1]->AdjustCellBorderStyle(dgv1ph, dgv1ph,true, true,true, true);
        this->dataGridView1->Rows[3]->Cells[3]->AdjustCellBorderStyle(dgv1ph, dgv1ph,true, true,true, true);

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This code above in principle should hange the right border of the cells 1,1 and 3,3 but as it do compile, a i try to run that part of the code the application breaks with system null reference exception.

The code you have posted has nothing to do with the native C++.
It looks like the managed code.

So I move this thread to the most appropriate Forum.

[moved from Visual C++ Programming Forum]

Sorry, there were almost no posts here so i assumed its not the propper place