diff --git a/ptrarray.c b/ptrarray.c
new file mode 100644
index 00000000..d08cb295
--- /dev/null
+++ b/ptrarray.c
@@ -0,0 +1,58 @@
+// 5 may 2015
+#include <string.h>
+#include "ui.h"
+#include "uipriv.h"
+
+// TODO see if we can use memmove()
+
+struct ptrArray newPtrArray(void)
+{
+	return uiNew(struct ptrArray);
+}
+
+void ptrArrayDestroy(struct ptrArray *p)
+{
+	// TODO check iif len is nonzero
+	uiFree(p);
+}
+
+#define grow 32
+
+void ptrArrayAppend(struct ptrArray *p, void *d)
+{
+	p->len++;
+	if (p->len >= p->cap) {
+		p->cap += grow;
+		p->ptrs = (void **) uiRealloc(p->ptrs, p->cap * sizeof (void *));
+	}
+	p->ptrs[p->len - 1] = d;
+}
+
+void ptrArrayInsertBefore(struct ptrArray *p, uintmax_t i, void *d)
+{
+	uintmax_t j;
+
+	if (i >= p->len)
+		complain("index out of range in ptrArrayInsertBefore()");
+	// TODO does this need to be here
+	p->len++;
+	if (p->len >= p->cap) {
+		p->cap += grow;
+		p->ptrs = (void **) uiRealloc(p->ptrs, p->cap * sizeof (void *));
+	}
+	for (j = p->len - 1; j >= i; j--)
+		p->ptrs[j + 1] = p->ptrs[j];
+	p->ptrs[i] = d;
+}
+
+void ptrArrayDelete(struct ptrArray *p, uintmax_t i)
+{
+	uintmax_t j;
+
+	if (i >= p->len)
+		complain("index out of range in ptrArrayRemove()");
+	for (j = i; j < p->len - 1; j++)
+		p->ptrs[j] = p->ptrs[j + 1];
+	p->ptrs[j] = NULL;
+	p->len--;
+}
diff --git a/uipriv.h b/uipriv.h
index 7d70d381..f37ca174 100644
--- a/uipriv.h
+++ b/uipriv.h
@@ -14,3 +14,15 @@ extern uiContainer *newBin(void);
 extern void binSetMainControl(uiContainer *, uiControl *);
 extern void binSetMargins(uiContainer *, intmax_t, intmax_t, intmax_t, intmax_t);
 extern void binSetParent(uiContainer *, uintptr_t);
+
+// array.c
+struct ptrArray {
+	void **ptrs;
+	uintmax_t len;
+	uintmax_t cap;
+};
+struct ptrArray *newPtrArray(void);
+void ptrArrayDestroy(sstruct ptrArray *);
+void ptrArrayAppend(struct ptrArray *, void *);
+void ptrArrayInsertBefore(struct ptrArray *, uintmax_t, void *);
+void ptrArrayDelete(struct ptrArray *, uintmax_t);
diff --git a/windows/init.c b/windows/init.c
index 3b500233..19e3340c 100644
--- a/windows/init.c
+++ b/windows/init.c
@@ -110,7 +110,6 @@ void uiFreeInitError(const char *err)
 	uiFree((void *) err);
 }
 
-// TODO consider DisableThreadLibraryCalls() (will require removing ALL C runtime calls); if we do so we will need to adjust the below signature
 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 {
 	if (fdwReason == DLL_PROCESS_ATTACH)