Windows API Guide: EM_CANUNDO Message

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Declare Function EqualRect Lib "user32.dll" (lpRect1 As RECT, lpRect2 As RECT) As Long

Platforms: Win 32s, Win 95/98, Win NT

EqualRect determines if two rectangles are equal. Rectangles are considered equal if and only if the upper-left and lower-right corners (the points that define the rectangles) of one rectangle are equal to those of another. The function returns 1 if the two rectangles are equal and 0 if they are unequal.

lpRect1

The first of the two rectangles to check.

lpRect2

The second of the two rectangles to check.

Example:

' Demonstrate equal and unequal rectangles Dim r As RECT, s As RECT  ' rectangles to use Dim areequal As Long  ' receives whether the rectangles are equal or not Dim retval As Long  ' return value ' Initialize the two rectangles using the API retval = SetRect(r, 15, 20, 100, 110)  ' r = (15,20)-(100,110) retval = SetRect(s, 15, 20, 100, 110)  ' s = (15,20)-(100,110) areequal = EqualRect(r, s)  ' compare the rectangles If areequal = 1 Then Debug.Print "Are Equal" Else Debug.Print "Are Not Equal" ' Change the second rectangle retval = SetRect(s, 30, 45, 200, 250)  ' s = (30,45)-(200,250) areequal = EqualRect(r, s)  ' compare the rectangles If areequal = 1 Then Debug.Print "Are Equal" Else Debug.Print "Are Not Equal" ' The first time is Are Equal, the second is Are Not Equal.

See Also: CopyRect
Category: Rectangles

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