Find id of cstatic in a derived class

Question

1.00/5 (2 votes)

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I created a derived class of CStatic, and I must find id of my CStatic but I don't know how I can do

IMPLEMENT_DYNAMIC(CDerStatic, CStatic)

CDerStatic::CDerStatic()
{
	int n_color;
	RGBTRIPLE rgb;
	double red;
	double green;
	double blue;
	COLORREF Color;
	CBrush Brush;
	CSize csSizeOfText;
	CString cs;

	//GetDlgItem();  //software doesn't compile if I add this row

}

What I have tried:

I tried to use GetDlgItem but it isn't right

Posted 10-Apr-24 2:29am

Member 14594285

Updated 10-Apr-24 3:19am

v4

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Comments

Richard MacCutchan 10-Apr-24 8:57am

"I tried to use GetDlgIten but it isn't right"
And you think that somehow we can guess what your code is doing and fix it for you?

Member 14594285 10-Apr-24 8:59am

I improved my question

jeron1 10-Apr-24 10:07am

https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getdlgitem
GetDlgItem() takes up to 2 input parameters, you have none specified. It returns an HWND which you are not looking at.

3 solutions

Solution 2

You can also open the RC file with a text editor and search for the control.

IMPORTANT: each control must have an unique ID in your app. So check whether each control has an own identifier and the identifier are resolved in the resource.h to different values.
If that isnt properly handled than you will face trouble like crashes with some mismatching controls.

Posted 11-Apr-24 1:17am

KarstenK

Solution 3

The MFC uses CWnd::GetDlgItem and uses an existing pointer to the parent window or dialog as a member of CWnd.

see: https://learn.microsoft.com/en-us/cpp/mfc/reference/cwnd-class?view=msvc-170#getdlgitem

Unfortunately, it is not clear from the question what the non-functioning call currently looks like.
According to the documentation, there are two possible methods for an MFC program:

C

CWnd* GetDlgItem(int nID) const;
void GetDlgItem( int nID, HWND* phWnd) const;

There is also a Win32 API function with the same name for dialog boxes

C

HWND GetDlgItem( [in, optional] HWND hDlg, [in] int nIDDlgItem);

Posted 11-Apr-24 11:20am

merano99

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CPallini · Accepted Answer · 2024-04-10T04:42:00

Solution 1

You could try (not tested)

C++

HWND hwnd = GetSafeHwnd();
LONG id = GetWindowLong(hwnd, GWL_ID);

Posted 10-Apr-24 4:42am

CPallini