Check for clicks within an object

[Kronus]

Writing this code that handles clicks with the left mouse button. But I want to be able to check for clicks within a 200x200 pixel area. Here's what I have:

void EGame::OnLButtonDown(int mX, int mY) {
    int ID = mX / 200;
    ID = ID + ((mY / 200) * 3);

    if(grid[ID] != GRID_TYPE_NONE) {
        return;
    }

    if(currentplayer == 0) {
        SetCell(ID, GRID_TYPE_X);
        currentplayer = 1;
        Logger::Log("X player has moved.");
    }else{
        SetCell(ID, GRID_TYPE_O);
        currentplayer = 0;
        Logger::Log("O player has moved.");
    }
// Code that checks for clicks.

}

Using the width and height of the object, e.g; pX->w is width and pX->h is height
How would I check within the 200x200 area with mX and mY?

[ats15]

I'm not sure I understand correctly what is your question. Do you need the position inside your 200x200 cell? then I would replace lines 2 and 3 with

int idX=mX/200, idY=mY/200;
int ID=idX+3*idY;

and then after line 18,

int posX,posY;
posX=mX-idX*200;
posY=mY-idY*200;

[Kronus]

@ats15

Sorry for not being clear, as the top code is fine. It's the comment line. mX and mY are the coords where the mouse clicks.