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 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_INT LVectorDialog__IsValidExample(HWND hWnd) { L_INT nRet; 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); nRet = Vector.Load(TEXT("C:\\Program Files\\LEAD Technologies, Inc\\LEADTOOLS 15.0\\Images\\test.dxf")); if(nRet != SUCCESS) return nRet; 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 return SUCCESS; }