selfImDrawList handle on which this method operates.
p_minTop-left corner of the rectangle in absolute screen coordinates.
p_maxBottom-right corner of the rectangle in absolute screen coordinates.
colPacked ImU32 RGBA color; alpha controls opacity.
roundingCorner radius in screen pixels; 0 creates square corners. Draw flags select which corners are rounded.
flagsImDrawFlags options controlling this operation; combine compatible flag bits with |.
thicknessStroke thickness in screen pixels.
Append an axis-aligned rectangular outline to the draw list.