C / C++ / MFC

ForNow wrote:

The Sublassing concept I thought refers to messages that were sent to a Control/window by specfying a Window/CWnd object as the 3rd parm of the DDX_CONTROL macro

ForNow wrote:

I unnderstand the button cotrol can't have data

ForNow wrote:

f I undertand correctly part of what DDX_CONTROL does is subclass

ForNow wrote:

are messages for it still processed thru the Dialogs Message map or ....

ForNow wrote:

If I took a Class in MFC What would the Previous Dialog Cost me

ForNow wrote:

Wanta a Free Cheese Burger

void AFXAPI DDX_Control(CDataExchange* pDX, int nIDC, CWnd& rControl)
{
	if ((rControl.m_hWnd == NULL) && (rControl.GetControlUnknown() == NULL))    // not subclassed yet
	{
		// ... more code here ...
	}
}

ForNow wrote:

IF you use DDX_CONTROL there is no need for using Create/Attach which associates a windows object the CWnd/Control object

sam_psycho wrote:

How can I store address of integer array to void pointer

int anArray[1234];

void* pointyThing = (void*)(anArray);

and print array using void pointer?

MyPrintArrayFunction(pointyThing);

int arr[]={10,20,3};
   void *ptr=(void *)arr;
   printf("%d",*ptr); // getting error on this line

Joe Woodbury wrote:

printf expects you to pass a value as an argument. By definition you can't resolve a void pointer.

Joe Woodbury wrote:

Be happy;

Joe Woodbury wrote:

in the past the compiler wouldn't stop you from being stupid.

Joe Woodbury wrote:

The point is that you could do *(int*)ptr.

int arr[]={10,20,3,6};
     void *ptr=(void *)arr;
     int i=3;
     while(i--)
     {
     printf(" %d",(*(int *)ptr));
     (int *)ptr+=2;
     }

Joe Woodbury wrote:

I don't understand why you are using a void*

ptr = (int*)ptr + 1;

// code for initially connecting to Excel
// adapted from "A brief introduction to C++ and Interfacing with Excel"
// by Andrew L. Hazel, School of Mathematics, University of Manchester

// Microsoft Office Objects
#import \
 "C:\Program Files\Common Files\Microsoft Shared\OFFICE12\MSO.DLL" \
rename("DocumentProperties","DocumentPropertiesXL") \
rename("RGB", "RGBXL")
// I changed OFFICE11 to OFFICE12, since I am using Excel 2007

// Microsoft VBA Objects
#import \
 "C:\Program Files\Common Files\Microsoft Shared\VBA\VBA6\VBE6EXT.OLB"

// Excel Application Objects
#import "C:\Program Files\Microsoft Office\OFFICE12\EXCEL.EXE" \
rename("DialogBox", "DialogBoxXL") rename("RGB", "RGBXL") \
rename("DocumentProperties", "DocumentPropertiesXL") \
rename("ReplaceText","ReplaceTextXL") \
rename("CopyFile","CopyFileXL") \
exclude("IFont","IPicture") no_dual_interfaces

#include <iostream>
using std::cout;
using std::endl;
#include <cstdlib>

int main()
{
	Excel::_ApplicationPtr XL;
	HRESULT hr;
	
	try
	{
		CoInitialize(NULL);
	
		XL.CreateInstance(L"Excel.Application");
		
		XL->Visible = true;
	}
	catch(_com_error &error)
	{
		cout << "COM error " << endl;
	}

	// create workbook & worksheet
	// identify range to which array will be assigned
	XL->Workbooks->Add(Excel::xlWorksheet);
	Excel::_WorksheetPtr pSheet = XL->ActiveSheet;
	Excel::RangePtr pRange = pSheet->Cells;
	Excel::RangePtr pBeginRange = pRange->Item[1][1];
	Excel::RangePtr pEndRange = pRange->Item[1][1];
	Excel::RangePtr pTotalRange = pSheet->Range[(Excel::Range*)pBeginRange][(Excel::Range*)pEndRange];
	
	
	// create some BSTRs
	wchar_t wsz1[] = L"C";
	wchar_t wsz2[] = L"D";
	BSTR bstr1;
	bstr1 = SysAllocString(wsz1);
	BSTR bstr2;
	bstr2 = SysAllocString(wsz2);
	
	// create safearray
	SAFEARRAYBOUND rgsabound[2] = { 0 };
	rgsabound[0].cElements = 1; // num rows
	rgsabound[0].lLbound = 0; // lower bound
	rgsabound[1].cElements = 1; // num cols
	rgsabound[1].lLbound = 0; // lower bound
	
	VARIANT arr;
	arr.vt = VT_ARRAY | VT_BSTR;
	arr.parray = SafeArrayCreate(VT_BSTR,2,rgsabound);
	
	// identify index we want to change
	long index[2];
	
	// modify first element <0,0>
	index[0]	= 0;
	index[1] = 0;
	hr = SafeArrayPutElement(arr.parray,index,bstr1);
	
	// modify second element <0,1>
	// index[0] = 0;
	// index[1] = 1;
	// hr = SafeArrayPutElement(mySafeArrayPtr,index,bstr2);
	
	// assign safearray to range
	pTotalRange->PutValue2(&arr);
		
	// cleanup
	VariantClear(&arr);
	SysFreeString(bstr1);
	SysFreeString(bstr2);
	CoUninitialize();
	
	
	return 0;
}