[Threshold]

An easier way of writing this, just for piece of mind, is:

pawn Code:

GetPlayerColor(playerid) & (0xFFFFFF00);

This will change the alpha values to '00', hence making it a transparent marker.

Example of its usage:

pawn Code:

SetPlayerColor(playerid, GetPlayerColor(playerid) & (0xFFFFFF00));

This could be used in a command such as /invisible, which would make your map marker invisible to others.

pawn Code:

SetPlayerColor(playerid, GetPlayerColor(playerid) & (0xFFFFFFFF));

This would do the opposite and make the alpha values 'FF', hence your marker being full color and no transparency again. Like a /visible command.