LVectorDialog::IsValid

#include "ltwrappr.h"

L_BOOL LVectorDialog::IsValid(L_VOID)

Determines whether the LVectorDialog object is valid.

Returns

TRUE	There is a pointer to a valid bitmap object.
FALSE	There is not a pointer to a valid bitmap object.

Comments

Call this function to check if the class object has been associated with a valid LVectorBase object.

Before you can use some of the LVectorDialog functions, a vector must be associated with the class object. Until you have associated a valid vector object with the LVectorDialog object, this function will return false.

In particular, you cannot perform auto-processing without a valid bitmap.

Required DLLs and Libraries

LVKRN
LVDLG
LTFIL

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

See Also

Functions:

LVectorDialog::LVectorDialog, LVectorDialog::SetVector, Class Members

Example

L_VOID Example37(HWND hWnd)
{
   LVectorBase Vector;
   LVectorDialog VectorDlg;

   //Dialog is invalid unless associated with a vector
   if (VectorDlg.IsValid ())
      MessageBox(hWnd, TEXT("IsValid() returns TRUE"), TEXT(""), MB_OK);
   else
      MessageBox(hWnd, TEXT("IsValid() returns FALSE"), TEXT(""), MB_OK);

   Vector.Load(TEXT("s:\\temp\\images\\dxf\\test.dxf"));
   VectorDlg.SetVector(&Vector);

   //Now dialog is valid
   if (VectorDlg.IsValid())
      MessageBox(hWnd, TEXT("IsValid() returns TRUE"), TEXT(""), MB_OK);
   else
      MessageBox(hWnd, TEXT("IsValid() returns FALSE"), TEXT(""), MB_OK);

   //destructor called when out of scope
}