typedef struct _ROTATEDLGPARAMS 
   L_UINT uStructSize; 
   pBITMAPHANDLE pBitmap; 
   L_INT nAngle; 
   L_BOOL bResize; 
   L_UINT uRotateFlags; 
   COLORREF crBack; 
   L_UINT32 uDlgFlags; 
   LTCOMMDLGHELPCB pfnHelpCallback; 
   L_VOID  *pHelpCallBackUserData; 

The ROTATEDLGPARAMS structure provides information used to initialize the dialog box created by the LDialogImage::DoModalRotate function. After the user closes the dialog box, this structure is updated with information about the user's selections.

Member Description
uStructSize Size of this structure, in bytes. Use the sizeof operator to calculate this value.
pBitmap Ignored.
nAngle A variable to be updated with the angle by which to rotate the image entered in the dialog. This angle is measured in hundredths of degrees. Possible values range from -36000 - +36000. A positive value will rotate the image in a clockwise rotation, while a negative value will rotate the image in a counter-clockwise rotation.
bResize A flag that indicates whether to resize the resulting image as needed. Possible values are:
  Value Meaning
  TRUE Check the check box and resize the resulting image as needed.
  FALSE Clear the check box and do not resize the resulting image.
uRotateFlags Variable to be updated with a value that represents the type of resizing to perform. Possible values are:
  Value Meaning
  0 Normal resize.
  ROTATE_RESAMPLE Resample resize.
  ROTATE_BICUBIC Bicubic resize.
crBack A variable to be updated with the background fill color entered in the dialog. You can specify a COLORREF value, such as the return value of the Windows RGB macro, or you can use the PALETTEINDEX macro to specify a palette color.
uDlgFlags User interface flags for this dialog, which determine the layout and action of the dialog. Possible values are:
  Value Meaning
  DLG_ROTATE_SHOW_CONTEXTHELP [0x00000002] dialog should contain a context sensitive help icon.
  DLG_ROTATE_SHOW_BACKCOLOR [0x00000008] dialog will show the background color button.
  DLG_ROTATE_SHOW_RESIZE [0x00000010] dialog will show the resize check box.
pfnHelpCallback Ignored.
pHelpCallBackUserData Ignored.
Help Version 20.0.2019.3.11
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LEADTOOLS Common Dialog C++ Class Library Help