Need Some Help Custom Slider Bar

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C++

DirectX

Ok, i am trying to draw a custom slider bar in c++ using dx9. I have a sprite that is 1 pixel wide to use as the progress bar fill texture, The lengh of the progress bar is 128 pixels.

I am calling the function like:
DrawSlider(int x, int y, int max, int fill)
x = x location
y = y location
max = max value of progress bar instance
fill = amount of fill to add to bar to show value.


my math is failing me but i believe i need two for loops in this function:
1 loop to fill the steps and 1 loop to add the steps to the bar.

failed attempt:

void DrawSlider(int x, int y, int max, int fill)
{
    int step = 128 / max;
    DrawSprite(v3SliderBar,texSliderBar);
    for(int i = 0; i <= max; i++)
    {
        for(int j = 0; j <=step; j++)
        {
            DrawSprite(D3DXVECTOR3(v3SliderBar.x+j,v3SliderBar.y,0),texSliderFill);
        }
    }
}

remember my sprite is 1 pixel wide.


Ok, sorry if i wasnt clear enough. Let's say for example, I want the slider bar to be a min value of 0 and max value of 100. I want to draw 75% of the min/max which would be 75. My slider bar is 128 pixels wide, So i would need to draw 96 pixels for fill (fill is 1 pixel wide) to draw the slider at 75%. I am having trouble coding this though.

Example picture of slider: http://i.imgur.com/5oUv6tb.png
.........