diff --git a/common_windows.go b/common_windows.go
index e541c7b..5ebf0a4 100644
--- a/common_windows.go
+++ b/common_windows.go
@@ -26,8 +26,7 @@ const (
 	_TRUE = 1			// from windef.h
 )
 
-// TODO pull the thanks for these three from the old wingo source
-// TODO put these in windows.go
+// In MSDN, _LPARAM and _LRESULT are listed as signed pointers, however their interpretation is message-specific. Ergo, just cast them yourself; it'll be the same. (Thanks to Tv` in #go-nuts for helping me realize this.)
 type _WPARAM uintptr
 type _LPARAM uintptr
 type _LRESULT uintptr
diff --git a/winerrors.md b/winerrors.md
index fd401ca..8fe2cf3 100644
--- a/winerrors.md
+++ b/winerrors.md
@@ -1,6 +1,6 @@
 - all SendMessage() calls
 - BM_GETCHECK (sysData.isChecked())
-- WM_GETTEXTLENGTH (LRESULT is unsinged so) (sysData.text())
+- WM_GETTEXTLENGTH (LRESULT is signed but we treat it as unsigned and MSDN says nothing about error returns) (sysData.text())
 - WM_GETTEXT (WM_GETTEXTLENGTH docs say its result may be larger than the actual length, so we can't use that) (sysData.text())
 - CB_GETCURSEL/LB_GETCURSEL (sysData.selectedIndex())
 - LB_GETSELCOUNT/LB_GETSELITEMS (LB_ERR is returned if this is a single-selection listbox; are there actual errors?) (sysData.selectedIndices())