No, the horizontal component of the weight force of a mass being pulled up an inclined plane is not a form of friction. The weight force of an object is the force exerted on it due to gravity, and it acts vertically downward. When an object is on an inclined plane, the weight force can be resolved into two components: one perpendicular to the plane (the normal force) and one parallel to the plane (the weight force's horizontal component).
Friction, on the other hand, is a force that opposes the relative motion or tendency of motion between two surfaces in contact. It acts parallel to the surfaces and is influenced by factors such as the nature of the surfaces and the normal force pressing them together.
The horizontal component of the weight force on an inclined plane is not due to friction but rather the result of resolving the weight force into its components along the axes of the inclined plane.