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bool blnMessageBoxCheckBox=false;
LRESULT CALLBACK MsgBoxHook(int nCode, WPARAM wParam, LPARAM lParam)
{
if(nCode==HCBT_ACTIVATE)//center the text on STATIC child control
{
HWND CheckBox;
//checking the checkbox stated
UINT t=SendMessage(CheckBox,BM_GETCHECK,0, 0);
if(t==BST_CHECKED)
blnMessageBoxCheckBox=true;
else
blnMessageBoxCheckBox=false;
HWND hwnd = (HWND)wParam;
HWND hwnd2 = FindWindowEx(hwnd, NULL,"STATIC",NULL);
if (hwnd2!=NULL && (MGBEXTENDED & MB_EX_TEXTCENTER))
{
SetWindowLong(hwnd2, GWL_STYLE, GetWindowLong(hwnd2, GWL_STYLE) | SS_CENTER);
//MessageBox(NULL, to_string(GetLastError()).c_str(), "error", MB_OK);
}
if (((GetWindowLong(hwnd, GWL_STYLE) & WS_DLGFRAME) || (GetWindowLong(hwnd, GWL_STYLE) & WS_POPUP)) && hwnd2!=NULL)
{
//creating a checkbox and set it's state, depending on last value
RECT a;
GetClientRect(hwnd,&a);
CheckBox = CreateWindowEx(NULL, "BUTTON", "Hel&lo",
WS_CHILD | WS_VISIBLE | BS_AUTOCHECKBOX | BS_TEXT,
2, 50, a.right-a.left-4, 15, hwnd, NULL, GetModuleHandle(NULL), NULL);
HFONT g_hfFont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
SendMessage(CheckBox, WM_SETFONT,(WPARAM) g_hfFont, TRUE);
if(blnMessageBoxCheckBox==true)
SendMessage(CheckBox,BM_SETCHECK,(WPARAM)BST_CHECKED, TRUE);
}
}
else if (nCode == HCBT_CREATEWND)//center the messagebox on it's parent
{
CREATESTRUCT *pcs = ((CBT_CREATEWND *)lParam)->lpcs;
if ((pcs->style & WS_DLGFRAME) || (pcs->style & WS_POPUP))
{
HWND hwnd = (HWND)wParam;
// At this point you have the hwnd of the newly created
// message box that so you can position it at will
//SendMessage(hwnd, WM_SETA ,(WPARAM) font, TRUE)
if(MGBEXTENDED & MB_EX_PARENTCENTER)
{
RECT parentrct;
GetWindowRect(ActivatedForm,&parentrct);
LONG x=parentrct.left+(parentrct.right-parentrct.left)/2 - pcs->cx/2;
LONG y=parentrct.top+(parentrct.bottom-parentrct.top)/2 - pcs->cy/2;
pcs->x=x;
pcs->y=y;
}
}
}
return (CallNextHookEx(hhookCBTProc, nCode, wParam, lParam));
}
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