IKRotation

This function rotates a raster image. Use this function in Visual Basic and Visual C++. For C++Builder and Delphi, please refer to the IKRotationEx function.

[Visual Basic] Function IKRotation(SrcHandle As IKSELECT_IMAGE, ByVal Angle As Long, ByVal TurnX As Long, ByVal TurnY As Long, ByVal Mode As Long, ByVal Red As Byte, ByVal Green As Byte, ByVal Blue As Byte, ByVal Clip As Long, ByVal UserProc As Long, ByVal Caption As String, ByVal Message As String, ByVal Button As String) As IKSELECT_IMAGE

[Visual C++] IKSELECT_IMAGE IKRotation(PTR_IKSELECT_IMAGE SrcHandle, int Angle, BOOL TurnX, BOOL TurnY, BOOL Mode, BYTE Red, BYTE Green, BYTE Blue, BOOL Clip, IKPROCESSPROC UserProc, LPCTSTR Caption, LPCTSTR Message, LPCTSTR Button);

Parameters

Name	Explanation
SrcHandle	A structure containing the image handle and the mask image handle member variables hImgBmh can be 1, 4, 8, 16, 24, or 32 bit images
Angle	Angle of rotation (-35999 to 35999, in 1/100 degree units)
TurnX	Reverses image along the x axis (False(0): no reversal, True (nonzero): reversal)
TurnY	Reverses image along the y axis (False(0): no reversal, True (nonzero): reversal)
Mode	Sets whether on not linear interpolation is used (False (0): does not interpolate, True (nonzero): interpolates). Interpolation is enabled for 8 bit grayscale, 16, 24, and 32 bit images only.
Red	The red component of the background color (from 0 to 255)
Green	The green component of the background color (from 0 to 255)
Blue	The blue component of the background color (from 0 to 255)
Clip	Sets whether or not the image is clipped (False(0): No clipping, True(nonzero) clipping)
UserProc	The address of the user function (If not using the user function then set to 0)
Caption	Sets the text displayed in the title bar of the progress dialog box
Message	Sets the message displayed in the progress dialog box
Button	Sets the name of the button displayed in the progress dialog box

Return Value

Returns the raster image handle and mask image handle in the structure members if successful. If unsuccessful, 0 is returned in the structure member variables.

Explanation

The IKRotation function rotates a raster image. Use this function in Visual Basic and Visual C++. For C++Builder and Delphi, please refer to the IKRotationEx function.

If the Angle parameter value is positive, the image is rotated counterclockwise, if the Angle parameter value is negative, the image is rotated clockwise. When the Clip parameter is True and the rotated image is larger than the original, the excess areas are cut.

Note: the image handles passed to IKSELECT_IMAGE are NOT automatically freed after executing this function.

If the user function is set or if the Caption, Message, and Button parameters are blank then the Progress dialog box is not displayed. If the Progress dialog box is displayed, it indicates the percentage of the current process completed. For more information about the user functions please refer to the Definition of User Function in the Ik9Effect.dll, Ik9EffectA.dll, Ik9Effect64.dll, Ik9Effect64A.dlll section.