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MQL5 ReferenceStandard LibraryPanels and DialogsCRectContains 

Contains

Checks if the point is inside the CRect class area.

bool  Contains(
   const int  x,     // X coordinate
   const int  y      // Y coordinate
   )

Parameters

x

[in]  X coordinate.

y

[in]  Y coordinate.

Return Value

true - the point is inside the area (including borders), otherwise - false.