diff --git a/xtldr2/textui.c b/xtldr2/textui.c
index 1cc3fe2..2959e47 100644
--- a/xtldr2/textui.c
+++ b/xtldr2/textui.c
@@ -33,9 +33,22 @@ typedef struct _XTBL_DIALOG_HANDLE
     UINT_PTR Height;
 } XTBL_DIALOG_HANDLE, *PXTBL_DIALOG_HANDLE;
 
+/**
+ * Determines dialog box size based on enabled components and message length.
+ *
+ * @param Handle
+ *        Supplies a pointer to the dialog box handle.
+ *
+ * @param Message
+ *        Supplies a pointer to the message string put on the dialog box.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
 XTCDECL
 VOID
-BlpDetermineDialogBoxSize(IN PXTBL_DIALOG_HANDLE Handle,
+BlpDetermineDialogBoxSize(IN OUT PXTBL_DIALOG_HANDLE Handle,
                           IN PWCHAR Message)
 {
     UINT_PTR Width, Height, LineLength;
@@ -139,9 +152,25 @@ BlpDetermineDialogBoxSize(IN PXTBL_DIALOG_HANDLE Handle,
     Handle->Height = Height;
 }
 
+/**
+ * Draws dialog box with caption and message.
+ *
+ * @param Handle
+ *        Supplies a pointer to the dialog box handle.
+ *
+ * @param Caption
+ *        Specifies a caption string put on the dialog box.
+ *
+ * @param Message
+ *        Specifies a message string put on the dialog box.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
 XTCDECL
 VOID
-BlpDrawDialogBox(IN PXTBL_DIALOG_HANDLE Handle,
+BlpDrawDialogBox(IN OUT PXTBL_DIALOG_HANDLE Handle,
                  IN PWCHAR Caption,
                  IN PWCHAR Message)
 {
@@ -258,6 +287,16 @@ BlpDrawDialogBox(IN PXTBL_DIALOG_HANDLE Handle,
     }
 }
 
+/**
+ * Draws an active or inactive button in the dialog box, depending on the attributes.
+ *
+ * @param Handle
+ *        Supplies a pointer to the dialog box handle.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
 XTCDECL
 VOID
 BlpDrawDialogButton(IN PXTBL_DIALOG_HANDLE Handle)
@@ -295,6 +334,19 @@ BlpDrawDialogButton(IN PXTBL_DIALOG_HANDLE Handle)
     BlConsolePrint(L"[  OK  ]");
 }
 
+/**
+ * Draws an active or inactive input field in the dialog box, depending on the attributes.
+ *
+ * @param Handle
+ *        Supplies a pointer to the dialog box handle.
+ *
+ * @param InputFieldText
+ *        Supplies a pointer to the wide char string that will be displayed in the input field.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
 XTCDECL
 VOID
 BlpDrawDialogInputField(IN PXTBL_DIALOG_HANDLE Handle,
@@ -356,6 +408,19 @@ BlpDrawDialogInputField(IN PXTBL_DIALOG_HANDLE Handle,
     }
 }
 
+/**
+ * Draws a progress bar component in the dialog box.
+ *
+ * @param Handle
+ *        Supplies a pointer to the dialog box handle.
+ *
+ * @param Percentage
+ *        Specifies the percentage progress of the progress bar.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
 XTCDECL
 VOID
 BlpDrawDialogProgressBar(IN PXTBL_DIALOG_HANDLE Handle,