Function IncrementSharedCount

src/utilities/install/install.cpp:649–689

}

USHORT IncrementSharedCount(const TEXT* filename, err_handler_t err_handler)
{
/**************************************
 *
 *	I n c r e m e n t S h a r e d C o u n t
 *
 **************************************
 *
 * Functional description
 *	Increment the registry Shared Count of a module whose full path & file
 *	name is given in parameter 'filename'. Typically used to increment the
 *	shared count of the GDS32.DLL after its installation to WinSysDir. But
 *	can be used for just about any other shared component.
 *	User has to have enough rights to write to the HKLM key tree.
 *
 **************************************/

	HKEY hkey;
	LONG status = RegCreateKeyEx(HKEY_LOCAL_MACHINE, SHARED_KEY,
		0, "", REG_OPTION_NON_VOLATILE, KEY_READ | KEY_WRITE, 0, &hkey, 0);
	if (status != ERROR_SUCCESS)
		return (*err_handler) (status, "RegCreateKeyEx");

	DWORD count = 0;
	DWORD type, size = sizeof(count);
	RegQueryValueEx(hkey, filename, NULL, &type,
		reinterpret_cast<BYTE*>(&count), &size);

	++count;

	status = RegSetValueEx(hkey, filename, 0, REG_DWORD,
		reinterpret_cast<BYTE*>(&count), sizeof(DWORD));
	if (status != ERROR_SUCCESS)
	{
		RegCloseKey(hkey);
		return (*err_handler) (status, "RegSetValueEx");
	}
	RegCloseKey(hkey);

	return FB_SUCCESS;
}

USHORT DecrementSharedCount(const TEXT* filename, bool sw_force, err_handler_t err_handler)
{