Function FileSelectFolderCallback

source/script_autoit.cpp:1019–1030

int CALLBACK FileSelectFolderCallback(HWND hwnd, UINT uMsg, LPARAM lParam, LPARAM lpData)
{
	if (uMsg == BFFM_INITIALIZED) // Caller has ensured that lpData isn't NULL by having set a valid lParam value.
		SendMessage(hwnd, BFFM_SETSELECTION, TRUE, lpData);
	// In spite of the quote below, the behavior does not seem to vary regardless of what value is returned
	// upon receipt of BFFM_VALIDATEFAILED, at least on XP.  But in case it matters on other OSes, preserve
	// compatibility with versions older than 1.0.36.03 by keeping the dialog displayed even if the user enters
	// an invalid folder:
	// MSDN: "Returns zero except in the case of BFFM_VALIDATEFAILED. For that flag, returns zero to dismiss
	// the dialog or nonzero to keep the dialog displayed."
	return uMsg == BFFM_VALIDATEFAILED; // i.e. zero should be returned in almost every case.
}