location of modal dialog boxes

[foxnet]

Is there a way to place a modal dialog box of the screen by giving an x, y offset. I use the command

DialogBox(g_hInst, MAKEINTRESOURCE(IDD_OPTIONS), hwnd, (DLGPROC)

to place it on the screen, but is always goes to the top left corner.

 

[LazyMe]

It does a little bit more than you need, but this function handles WM_INITDIALOG to, among other things, locate it on a specific position on the screen:

LRESULT CDialogbox::InitDialog(HWND hwndDlg, HWND hwndControl, LPARAM lParam)
//Handles the WM_INITDIALOG message.
{
	LOCK(&m_csVars);

	HWND hwndOwner=NULL;
	HICON hIcon=NULL;
	RECT rcOwner={0}, rcDlg={0};
	VARIANT_BOOL bResult=VARIANT_TRUE;

	m_hWnd = hwndDlg;			//This one we must save for future messages.
	m_sWndMap[hwndDlg]=this;	//Store in the window map, so we can find the object in future messages as well.

	//Set title:
	if(m_lcTitle.Length()>0) 
		SetWindowText(m_hWnd, m_lcTitle);

	else {
		//If a title id was not specified, load the title text into the member variable:
		m_lcTitle.Reserve(GetWindowTextLength(m_hWnd)+1);
		
		GetWindowText(m_hWnd, m_lcTitle.GetBuffer(), m_lcTitle.BufferSize());
	}

	//Set small icon:
	if(m_nSmallIcon>0 && (hIcon=m_pRes->LoadResIcon(m_nSmallIcon, lsdIcon_Small))!=NULL) SendMessage(m_hWnd, WM_SETICON, static_cast<WPARAM>(ICON_SMALL), reinterpret_cast<LPARAM>(hIcon));

	//Set large icon:
	if(m_nLargeIcon>0 && (hIcon=m_pRes->LoadResIcon(m_nLargeIcon, lsdIcon_Big))!=NULL) SendMessage(m_hWnd, WM_SETICON, static_cast<WPARAM>(ICON_BIG), reinterpret_cast<LPARAM>(hIcon));

	//Add extra windowstyles:
	if(m_nStyles>0) SetWindowLong(m_hWnd, GWL_STYLE, GetWindowLong(m_hWnd, GWL_STYLE)|m_nStyles);
	if(m_nExtraStyles>0) SetWindowLong(m_hWnd, GWL_EXSTYLE, GetWindowLong(m_hWnd, GWL_EXSTYLE)|m_nExtraStyles);

	//Fire the event:
	Fire_Initialize(m_enmPosition, m_nXPos, m_nYPos, &bResult);

	//If necessary, position the dialogbox:
	switch(m_enmPosition) {
		case lsdResDlg_CenterOwner:
			if((hwndOwner=GetParent(m_hWnd))==NULL) hwndOwner=GetDesktopWindow();

		case lsdResDlg_CenterScreen:
			if(hwndOwner==NULL) hwndOwner=GetDesktopWindow();
			GetWindowRect(hwndOwner, &rcOwner);
			GetWindowRect(m_hWnd, &rcDlg);

			SetWindowPos(m_hWnd, HWND_TOP, rcOwner.left+(((rcOwner.right-rcOwner.left)-(rcDlg.right-rcDlg.left))/2), rcOwner.top+(((rcOwner.bottom-rcOwner.top)-(rcDlg.bottom-rcDlg.top))/2), 0, 0, SWP_NOSIZE);
			break;

		case lsdResDlg_Specific:
			SetWindowPos(m_hWnd, HWND_TOP, m_nXPos, m_nYPos, 0, 0, SWP_NOSIZE);
			break;
	}

	//And to be absolutely sure it will ALWAYS be entirely visible:
	SendMessage(m_hWnd, DM_REPOSITION, NULL, NULL);

	UNLOCK(&m_csVars);

	return bResult==VARIANT_TRUE;
}

Greetings,
Rick