diff --git a/zig-impl/crystal/some-crystal-app/makefile b/zig-impl/crystal/some-crystal-app/makefile
index 68601f2..f62e8a0 100644
--- a/zig-impl/crystal/some-crystal-app/makefile
+++ b/zig-impl/crystal/some-crystal-app/makefile
@@ -5,5 +5,11 @@ VG_OPTS  = --leak-check=full -v
 VG_OPTS += --suppressions=valgrind.suppressions 
 VG_OPTS += --gen-suppressions=all
 
+build:
+	CRYSTAL_LIBRARY_PATH=$(LDPATH) shards build
+
 valgrind:
 	LD_LIBRARY_PATH=$(LDPATH) valgrind $(VG_OPTS) $(SRC)
+
+run:
+	LD_LIBRARY_PATH=$(LDPATH) $(SRC)
diff --git a/zig-impl/crystal/some-crystal-app/src/some-crystal-app.cr b/zig-impl/crystal/some-crystal-app/src/some-crystal-app.cr
index 68b8e72..f3af131 100644
--- a/zig-impl/crystal/some-crystal-app/src/some-crystal-app.cr
+++ b/zig-impl/crystal/some-crystal-app/src/some-crystal-app.cr
@@ -12,34 +12,27 @@ lib LibIPC
 #		SwitchTx      # Switch subsystem: message send.
 #	end
 
-	fun init   = ipc_context_init   (Pointer(Pointer(Void))) : LibC::Int
-	fun deinit = ipc_context_deinit (Pointer(Void)) : Void
+	fun init   = ipc_context_init   (Void**) : LibC::Int
+	fun deinit = ipc_context_deinit (Void*) : Void
+
+	# Connection functions.
+	# Context is allocated, ipcd is requested and the connection/initialisation is performed.
+	fun service_init    = ipc_service_init   (Void*, LibC::Int*, LibC::Char*, LibC::UInt16T) : LibC::Int
+	fun connect_service = ipc_connect_service(Void*, LibC::Int*, LibC::Char*, LibC::UInt16T) : LibC::Int
+
+	fun wait = ipc_wait_event(Void*, Char*, LibC::UInt64T*, LibC::Int*, Char*, LibC::UInt64T*) : LibC::Int
+
+	# Sending a message NOW.
+	# WARNING: unbuffered send do not wait the fd to become available.
+	fun write = ipc_write(Void*, LibC::Int, UInt8*, LibC::UInt64T) : LibC::Int
+	# Sending a message (will wait the fd to become available for IO operations).
+	fun schedule = ipc_schedule(Void*, LibC::Int, UInt8*, LibC::UInt64T) : LibC::Int
+
+	fun read = ipc_read_fd (Void*, LibC::Int, UInt8*, LibC::UInt64T*);
 
-#	# Connection functions.
-#	# Context is allocated, ipcd is requested and the connection/initialisation is performed.
-#	fun service_init    = ipc_service_init   (Pointer(Void), LibC::Int*, LibC::Char*, LibC::UInt16) : LibC::Int
-#	fun connect_service = ipc_connect_service(Pointer(Void), LibC::Int*, LibC::Char*, LibC::UInt16) : LibC::Int
-#
 #	# Closing connections.
 #	fun ipc_close(Pointer(Void), index : LibC::UInt64T) : LibC::Int
 #	fun ipc_close_all(Pointer(Void)) : LibC::Int
-#
-#	# Loop function.
-#	fun ipc_wait_event(Ctx*, Event*, LibC::Int*) : LibC::Int
-#
-#	# Adding and removing file discriptors to read.
-#	fun ipc_add(Ctx*, Connection*, Pollfd*) : LibC::Int
-#	fun ipc_del(Ctx*, LibC::UInt) : LibC::Int
-#	fun ipc_add_fd(Ctx*, LibC::Int) : LibC::Int
-#	fun ipc_del_fd(Ctx*, LibC::Int) : LibC::Int
-#
-#	# Sending a message (will wait the fd to become available for IO operations).
-#	fun ipc_write(Ctx*, Message*) : LibC::Int
-#	fun ipc_schedule(Pointer(Void), ) : LibC::Int
-#
-#	# Sending a message NOW.
-#	# WARNING: unbuffered send do not wait the fd to become available.
-#	fun ipc_write_fd(Int32, Message*) : LibC::Int
 end
 
 # TODO: Write documentation for `Some::Crystal::App`
@@ -49,5 +42,44 @@ module Some::Crystal::App
   # TODO: Put your code here
   ctx : Pointer(Void) = Pointer(Void).null
   LibIPC.init (pointerof(ctx))
+  fd : Int32 = 0
+  LibIPC.connect_service(ctx, pointerof(fd), "pong", 4)
+  pp! fd
+  LibIPC.write(ctx, fd, "Hello", 5)
+
+  buflen : LibC::UInt64T = 10
+  #buffer = uninitialized UInt8[10]
+  buffer = Array(UInt8).new(10, 88)
+  #buffer[0] = 'a'
+  #buffer[1] = 'b'
+  #buffer[2] = 'c'
+  #buffer[3] = 'd'
+  #buffer[4] = 'e'
+  #buffer[5] = 'f'
+  #pp! buffer[0]
+  #pp! buffer[1]
+  #pp! buffer[2]
+  #pp! buffer[3]
+  #pp! buffer[4]
+  #pp! buffer[5]
+  LibIPC.read(ctx, fd, buffer.to_unsafe, pointerof(buflen))
+  pp! buflen
+  pp! buffer.size
+  buffer[buflen] = 0
+  str = String.new(buffer.to_unsafe)
+  pp! str
+
+  #received = String.build do |str|
+  #  count = buflen
+  #  while count > 0
+  #    str << buffer[buflen - count]
+  #    count -= 1
+  #  end
+  #end
+  #pp! received
+
+  #received = Slice.new(buffer.to_unsafe, buflen)
+  ##puts "Buffer is: [#{received}]"
+
   LibIPC.deinit (ctx)
 end