IMatrixRotateAt Method

void RotateAt(
	float angle,
	float centerX,
	float centerY
)

Sub RotateAt ( 
	angle As Single,
	centerX As Single,
	centerY As Single
)

abstract RotateAt : 
        angle : float32 * 
        centerX : float32 * 
        centerY : float32 -> unit 

Parameters

angle

Type: SystemSingle
Angle in degrees to rotate. A positive value indicates a clockwise rotation, whereas a negative value will rotate counter clockwise

centerX

Type: SystemSingle
X co-ordinate of the point to rotate around

centerY

Type: SystemSingle
Y co-ordinate of the point to rotate around

Reference