#include <windows.h>

UINT AddStyle(HWND hwnd, UINT style)
{
	UINT oldstyle = GetWindowLong(hwnd, GWL_STYLE);
	SetWindowLong(hwnd, GWL_STYLE,  oldstyle | style);
	return oldstyle;
}

UINT AddDlgItemStyle(HWND hwnd, UINT nCtrlId, UINT style)
{
	return SetStyle(GetDlgItem(hwnd, nCtrlId), style);
}

UINT DelStyle(HWND hwnd, UINT style)
{
	UINT oldstyle = GetWindowLong(hwnd, GWL_STYLE);
	SetWindowLong(hwnd, GWL_STYLE, oldstyle & ~style);
	return oldstyle;
}

UINT DelDlgItemStyle(HWND hwnd, UINT nCtrlId, UINT style)
{
	return DelStyle(GetDlgItem(hwnd, nCtrlId), style);
}