Add build files and extra source files for windows

diff --git a/windows/cmd/gvui/Main.bas b/windows/cmd/gvui/Main.bas
new file mode 100644 (file)
index 0000000..2352d7d
--- /dev/null
+++ b/windows/cmd/gvui/Main.bas
@@ -0,0 +1,15 @@
+Attribute VB_Name = "Main"\r
+'\r
+' Constants used here and there\r
+'\r
+Public Const GRAPH As Integer = &H1\r
+Public Const NODE As Integer = &H2\r
+Public Const EDGE As Integer = &H4\r
+Public Const SUBGRAPH As Integer = &H8\r
+Public Const CLUSTER As Integer = &H10\r
+Public Const ANY_ELEMENT As Integer = GRAPH Or NODE Or EDGE Or SUBGRAPH Or CLUSTER\r
+\r
+Public Const DOT As Integer = &H1\r
+Public Const NEATO As Integer = &H2\r
+Public Const TWOPI As Integer = &H4\r
+Public Const ALL_ENGINES As Integer = DOT Or NEATO Or TWOPI\r