Thread: CComboBoxEx Error, Visual C++

Hi I am trying to create a combo box but am getting an error when passing the parameters to the CComboBoxEx::Create() function, wondering if anyone could help, here is code:

Code:

typedef struct tagRECT {
                           LONG left;
                           LONG top;
                           LONG right;
                           LONG bottom;
	} RECT;

	RECT pos;

	pos.left = 0;
	pos.top = 0;
	pos.right = 20;
	pos.bottom = 20;
		
	CComboBoxEx getFile;

	CComboBoxEx();
	
	getFile.Create(CBS_DROPDOWNLIST, pos, IDD_BENSVISTTEST_DIALOG, 1);

Here is error message:
error C2664: 'Create' : cannot convert parameter 2 from 'struct CBensVistTestDlg::OnEditchangeCombo1::tagRECT' to 'const struct tagRECT &'

Thanks in advance.

Ben

It looks like your are redefining the RECT struct. Why?
It is defined like this:

Code:

typedef struct _RECT { 
  LONG left; 
  LONG top; 
  LONG right; 
  LONG bottom; 
} RECT, *PRECT;

So you can see you need a type cast then.
Next your using MFC so you should use CRect instead.
Finally if you don't OR CBS_DROPDOWNLIST with WS_VISIBLE you will have to call ShowWindow().

Thanks mate I get you now, hopefully this next bit of code won't offend you, I have altered it as suggested nd I understand that now, this is my first time using VC++. It is having an error with my CWnd * pParent pointer, I don't know what the pointer is to the parent window and Create says it must not be Null, here is code:

Code:

void CBensVistTestDlg::OnEditchangeCombo1() 
{
	CComboBoxEx getFile;

	CComboBoxEx();

	CRect pos(0,0,20,20);
	
	getFile.Create(CBS_DROPDOWNLIST||WS_VISIBLE , pos, CBensVistTestDlg, 1);

	// TODO: Add your control notification handler code here
	
}

could you tell me if possible where I can find this efing pointer?

Here is error message:
error C2275: 'CBensVistTestDlg' : illegal use of this type as an expression

Thanks.

Ben.

Someone could just tell me if I am asking a stupid question?

I got your message and answered you there. I happed to be working when you posted these questions. I'm in the USA in the Eastern Time Zone.

SyntaxBubble the function Create does not take a pointer to a RECT or CRect it takes a reference. So if you create a new CRect on the heap then you must dereference it in the call to Create().

Don't worry about it. People make mistakes. Animals make mistakes. Hell even my people make mistakes.