CommentLine always at pos1

Web does reformat my writing :-(
I add a _ at the bein, just think it is not there:
I have this:
_extern void Filter1x1(unsigned char *Bits, 
_     const int RowBytes, const int PixDepth, 
_     const int Width, const int Height,
_     tFilter1x1 *Filter);

When I comment out by line I get this:
_// extern void Filter1x1(unsigned char *Bits, 
_     // const int RowBytes, const int PixDepth, 
_     // const int Width, const int Height,
_     // tFilter1x1 *Filter);

But i want this:
_// extern void Filter1x1(unsigned char *Bits, 
_//      const int RowBytes, const int PixDepth, 
_//      const int Width, const int Height,
_//      tFilter1x1 *Filter);

Ok again more specific.

When I use language C and mark 10 lines and make them comments, the // will not be at pos1 when line starts with spaces. Can I change this?
Example:
I have this:
extern void Filter1x1(unsigned char *Bits,
                const int RowBytes, const int PixDepth,
                const int Width, const int Height,
                tFilter1x1 *Filter);

When I comment out by line I get this:
// extern void Filter1x1(unsigned char *Bits,
                // const int RowBytes, const int PixDepth,
                // const int Width, const int Height,
                // tFilter1x1 *Filter);

But i want this:
// extern void Filter1x1(unsigned char *Bits,
//                const int RowBytes, const int PixDepth,
//                const int Width, const int Height,
//                tFilter1x1 *Filter);