diff --git a/uppsrc/ide/Builders/Builders.h b/uppsrc/ide/Builders/Builders.h
index d0a8118b1..bcba06028 100644
--- a/uppsrc/ide/Builders/Builders.h
+++ b/uppsrc/ide/Builders/Builders.h
@@ -76,6 +76,21 @@ struct GccBuilder : CppBuilder {
 	void BinaryToObject(String objfile, CParser& binscript, String basedir, const String& package, const Package& pkg);
 };
 
+struct OwcBuilder : CppBuilder {
+	typedef OwcBuilder CLASSNAME;
+
+	virtual void   AddFlags(Index<String>& cfg);
+	virtual bool   BuildPackage(const String& package, Vector<String>& linkfile, String& linkoptions,
+		const Vector<String>& all_uses, const Vector<String>& all_libraries, int optimize);
+	virtual bool   Link(const Vector<String>& linkfile, const String& linkoptions, bool createmap);
+	virtual bool   Preprocess(const String& package, const String& file, const String& target, bool asmout);
+
+	String CompilerName(bool isCpp = true) const;
+	String LinkerName() const;
+	String CmdLine(const String& package, const Package& pkg);
+	void   BinObjConsole(String c) { PutConsole(c); }
+};
+
 struct MscBuilder : CppBuilder {
 	typedef MscBuilder CLASSNAME;
 
diff --git a/uppsrc/ide/Builders/Builders.upp b/uppsrc/ide/Builders/Builders.upp
index c47ef615c..dafd650de 100644
--- a/uppsrc/ide/Builders/Builders.upp
+++ b/uppsrc/ide/Builders/Builders.upp
@@ -12,6 +12,7 @@ file
 	MakeFile.cpp,
 	GccBuilder.cpp,
 	MscBuilder.cpp,
+	OwcBuilder.cpp,
 	JavaBuilder.cpp,
 	ScriptBuilder.cpp,
 	Info readonly separator,
diff --git a/uppsrc/ide/Builders/OwcBuilder.cpp b/uppsrc/ide/Builders/OwcBuilder.cpp
new file mode 100644
index 000000000..fd5897921
--- /dev/null
+++ b/uppsrc/ide/Builders/OwcBuilder.cpp
@@ -0,0 +1,306 @@
+#include "Builders.h"
+
+#include <coff/binobj/binobj.h>
+
+void OwcBuilder::AddFlags(Index<String>& cfg)
+{
+
+}
+
+bool OwcBuilder::BuildPackage(const String& package, Vector<String>& linkfile, String& linkoptions, const Vector<String>& all_uses, const Vector<String>& all_libraries, int opt)
+{
+	String packagepath = PackagePath(package);
+	Package pkg;
+	pkg.Load(packagepath);
+	String packagedir = GetFileFolder(packagepath);
+	ChDir(packagedir);
+	PutVerbose("cd " + packagedir);
+	IdeConsoleBeginGroup(package);
+	Vector<String> obj;
+
+	/*bool is_shared = HasFlag("SO");
+	String shared_ext = (HasFlag("WIN32") ? ".dll" : ".so");*/
+
+	String cc = CmdLine(package, pkg),
+		clc = CompilerName(false), clcpp = CompilerName(true);
+
+	// <..> Flags configuration
+	if (HasFlag("MT"))
+	    cc << " -bm";
+#ifdef PLATFORM_WIN32
+	cc << " -bt=nt";
+#endif
+	String cc_speed = cc;
+	bool   release = false;
+
+	if(HasFlag("DEBUG"))
+		cc << " -d_DEBUG " << debug_options;
+	else {
+		release = true;
+		cc << ' ' << release_size_options;
+		cc_speed << ' ' << release_options;
+		if(opt == R_SPEED || pkg.optimize_speed)
+			cc = cc_speed;
+	}
+	// <..>
+
+	Vector<String> sfile, isfile;
+	Vector<String> soptions, isoptions;
+	Vector<bool>   optimize, ioptimize;
+	bool           error = false;
+
+	for(int i = 0; i < pkg.GetCount(); i++) {
+		if(!IdeIsBuilding())
+			return false;
+		if(!pkg[i].separator) {
+			String gop = Gather(pkg[i].option, config.GetKeys());
+			Vector<String> srcfile = CustomStep(SourcePath(package, pkg[i]));
+			if(srcfile.GetCount() == 0)
+				error = true;
+			for(int j = 0; j < srcfile.GetCount(); j++) {
+				String fn = srcfile[j];
+				String ext = ToLower(GetFileExt(fn));
+				if(ext == ".c" || ext == ".cpp" || ext == ".cc" || ext == ".cxx" || ext == ".rc" || ext == ".brc") {
+					sfile.Add(fn);
+					soptions.Add(gop);
+					optimize.Add(release && pkg[i].optimize_speed && opt == R_OPTIMAL);
+				}
+				else
+				if(ext == ".icpp") {
+					isfile.Add(fn);
+					isoptions.Add(gop);
+					ioptimize.Add(release && pkg[i].optimize_speed && opt == R_OPTIMAL);
+				}
+				else
+				if(ext == ".obj")
+					obj.Add(fn);
+				else
+				if(ext == ".lib")
+					linkfile.Add(fn);
+			}
+		}
+	}
+
+	if(HasFlag("BLITZ")) {
+		Blitz b = BlitzStep(sfile, soptions, obj, ".obj", optimize);
+		if(b.build) {
+			PutConsole("BLITZ:" + b.info);
+			int slot = AllocSlot();
+			if(slot < 0 || !Run(String().Cat() << clcpp << cc << ' '
+			<< GetHostPathQ(b.path) << " -fo=" << GetHostPathQ(b.object), slot, GetHostPath(b.object), b.count))
+				error = true;
+		}
+	}
+
+	int first_ifile = sfile.GetCount();
+	sfile.AppendPick(isfile);
+	soptions.AppendPick(isoptions);
+	optimize.AppendPick(ioptimize);
+
+	int ccount = 0;
+
+	for(int i = 0; i < sfile.GetCount(); i++) {
+		if(!IdeIsBuilding())
+			return false;
+		String fn = sfile[i];
+		String ext = ToLower(GetFileExt(fn));
+		bool rc = (ext == ".rc");
+		bool brc = (ext == ".brc");
+		bool init = (i >= first_ifile);
+		String objfile = CatAnyPath(outdir, GetFileName(fn) + ".obj");
+		if(HdependFileTime(fn) > GetFileTime(objfile)) {
+			int time = GetTickCount();
+			bool execerr = false;
+			if(rc) {
+				PutConsole(GetFileNamePos(fn));
+				int slot = AllocSlot();
+				if(slot < 0 || !Run("wrc -q -fo=" + GetHostPathQ(objfile) + Includes(" -i=", package, pkg)
+					+ ' ' + GetHostPathQ(fn), slot, GetHostPath(objfile), 1))
+					execerr = true;
+			}
+			else
+			if(brc) {
+				PutConsole(GetFileNamePos(fn));
+				try {
+					String hfn = GetHostPath(fn);
+					String brcdata = LoadFile(hfn);
+					if(brcdata.IsVoid())
+						throw Exc(NFormat("error reading file '%s'", hfn));
+					CParser parser(brcdata, hfn);
+					BinaryToObject(GetHostPath(objfile), parser, GetFileDirectory(hfn), THISBACK(BinObjConsole));
+				}
+				catch(Exc e) {
+					PutConsole(e);
+					execerr = true;
+				}
+			}
+			else {
+				String c = cc;
+				if(optimize[i])
+					c = cc_speed;
+				int slot = AllocSlot();
+
+				if(slot < 0 || !Run((ext == ".c" ? clc : clcpp + " -xr -xs") + c + soptions[i] + ' '
+					+ GetHostPathQ(fn) + " -fo=" + GetHostPathQ(objfile), slot, GetHostPath(objfile), 1))
+					execerr = true;
+			}
+
+			if(execerr)
+				DeleteFile(objfile);
+			error |= execerr;
+			PutVerbose("compiled in " + GetPrintTime(time));
+			ccount++;
+		}
+		if(init)
+			linkfile.Add(objfile);
+		else
+			obj.Add(objfile);
+	}
+
+	if(error) {
+		IdeConsoleEndGroup();
+		return false;
+	}
+
+	obj.Append(linkfile);
+	linkfile = obj;
+	return true;
+}
+
+bool OwcBuilder::Link(const Vector<String>& linkfile, const String& linkoptions, bool createmap)
+{
+	int time = GetTickCount();
+	if(!Wait())
+		return false;
+
+	const int linkfileCount = linkfile.GetCount();
+
+	for(int i = 0; i < linkfileCount; i++)
+		if(GetFileTime(linkfile[i]) >= targettime) {
+			String link;
+			link << LinkerName() << " option quiet";
+
+			if (HasFlag("DEBUG"))
+			    link << " debug all option incremental";
+#ifdef PLATFORM_WIN32
+			if (HasFlag("GUI"))
+				link << " system nt_win";
+			else if (HasFlag("DLL"))
+				link << " system nt_dll";
+			else link << " system nt";
+#endif
+			if(createmap)
+				link << " option map";
+
+			const int libpathCount = libpath.GetCount();
+			if (libpathCount > 0)
+			{
+				link << " libpath ";
+				for (int j = 0, k = libpathCount - 1; j < libpathCount; ++j)
+				{
+					link << '\"' << libpath[j] << '\"';
+					if (j < k)
+						link << ';';
+				}
+			}
+
+			if (!linkoptions.IsEmpty())
+				link << ' ' << linkoptions;
+
+			Vector<String> files, libs;
+
+			for (int j = 0; j < linkfileCount; ++j)
+			{
+				const String ext = GetFileExt(linkfile[j]);
+				if (ext == ".obj")
+					files.Add(linkfile[j]);
+				else if (ext == ".lib")
+					libs.Add(linkfile[j]);
+			}
+
+			const int filesCount = files.GetCount(),
+				libsCount = libs.GetCount();
+
+			if (filesCount > 0)
+			{
+				link << " file ";
+
+				for (int j = 0, k = filesCount - 1; j < filesCount; ++j)
+				{
+					link << '\'' << files[j] << '\'';
+					if (j < k)
+						link << ", ";
+				}
+			}
+
+			if (libsCount > 0)
+			{
+				link << " library ";
+
+				for (int j = 0, k = libsCount - 1; j < libsCount; ++j)
+				{
+					link << '\'' << GetHostPath(libs[i]) << '\'';
+					if (j < k)
+						link << ", ";
+				}
+			}
+
+			link << " name '" << GetHostPath(target) << '\'';
+
+			PutConsole("Linking...");
+			CustomStep(".pre-link");
+			if(Execute(link) == 0) {
+				CustomStep(".post-link");
+
+				PutConsole(String().Cat() << GetHostPath(target) << " (" << GetFileInfo(target).length
+				           << " B) linked in " << GetPrintTime(time));
+				return true;
+			}
+			else {
+				DeleteFile(target);
+				return false;
+			}
+		}
+
+	PutConsole(String().Cat() << GetHostPath(target) << " (" << GetFileInfo(target).length
+	           << " B) is up to date.");
+	return true;
+}
+
+bool OwcBuilder::Preprocess(const String& package, const String& file, const String& target, bool asmout)
+{
+	FileOut out(target);
+	const String packagepath = PackagePath(package);
+	Package pkg;
+	pkg.Load(packagepath);
+
+	return Execute((GetFileExt(file) == ".c" ? CompilerName(false) : CompilerName(true)) + CmdLine(package, pkg) + " -pl " + file, out);
+}
+
+String OwcBuilder::CompilerName(bool isCpp) const
+{
+	if(!IsNull(compiler)) return compiler;
+	return isCpp ? "wpp386" : "wcc386"; // C++ or C compiler
+}
+
+String OwcBuilder::LinkerName() const
+{
+	return "wlink";
+}
+
+String OwcBuilder::CmdLine(const String& package, const Package& pkg)
+{
+	return String().Cat() << " -zq -fr=" << Includes(" -i=", package, pkg);
+	// "-fr=" - do not create error files
+}
+
+Builder *CreateOwcBuilder()
+{
+	return new OwcBuilder;
+}
+
+void RegisterOwcBuilder()
+{
+	RegisterBuilder("OWC", CreateOwcBuilder);
+	//RegisterBuilder("OWC32", CreateOwcBuilder);
+}
diff --git a/uppsrc/ide/idewin.cpp b/uppsrc/ide/idewin.cpp
index fab692c53..29baa5968 100644
--- a/uppsrc/ide/idewin.cpp
+++ b/uppsrc/ide/idewin.cpp
@@ -820,7 +820,7 @@ void AppMain___()
 		}
 	#endif
 	}
-	
+
 #ifndef _DEBUG
 	SetVppLogSizeLimit(0);
 #endif
@@ -831,6 +831,7 @@ void AppMain___()
 	//	void RegisterIdeVectorDes(); RegisterIdeVectorDes();
 		void RegisterGccBuilder(); RegisterGccBuilder();
 		void RegisterMscBuilder(); RegisterMscBuilder();
+		void RegisterOwcBuilder(); RegisterOwcBuilder();
 		void RegisterJavaBuilder(); RegisterJavaBuilder();
 		void RegisterScriptBuilder(); RegisterScriptBuilder();