How to use this code ??

LPDIRECT3DDEVICE9 pDevice = NULL;

void FillColor( int x, int y, int w, int h, D3DCOLOR color, IDirect3DDevice9* pDevice )
{
if( w < 0 )w = 1;
if( h < 0 )h = 1;
if( x < 0 )x = 1;
if( y < 0 )y = 1;

D3DRECT rec = { x, y, x + w, y + h };
pDevice->Clear( 1, &rec, D3DCLEAR_TARGET, color, 0, 0 );
}

if( Menu.mOpt[1].nopt > 0 ){
D3DCOLOR xcolor = D3DCOLOR_ARGB( 255, 255, 0, 0 );

int size = 25, strong = 3;
int iCenterX = GetSystemMetrics( 0 ) / 2;
int iCenterY = GetSystemMetrics( 1 ) / 2;
if( iCenterX < 20 && iCenterY < 20 )
{
iCenterX = ( GetSystemMetrics( 0 ) / 2 );
iCenterY = ( GetSystemMetrics( 1 ) / 2 );
}
D3DRECT rec2 = { iCenterX- size, iCenterY, iCenterX+ size, iCenterY+ strong};
D3DRECT rec3 = { iCenterX, iCenterY- size, iCenterX+ strong,iCenterY+ size};
pDevice->Clear(1, &rec2, D3DCLEAR_TARGET, xcolor, 0, 0);
pDevice->Clear(1, &rec3, D3DCLEAR_TARGET, xcolor, 0, 0);
}