diff --git a/src/nimqml/private/dotherside.nim b/src/nimqml/private/dotherside.nim
index 1055211..59ea3bb 100644
--- a/src/nimqml/private/dotherside.nim
+++ b/src/nimqml/private/dotherside.nim
@@ -129,7 +129,7 @@ proc dos_qapplication_enable_hdpi() {.cdecl, dynlib: dynLibName, importc.}
 proc dos_qapplication_initialize_opengl() {.cdecl, dynlib: dynLibName, importc.}
 
 # QApplication
-proc dos_qapplication_create(appName: cstring) {.cdecl, dynlib: dynLibName, importc.}
+proc dos_qapplication_create() {.cdecl, dynlib: dynLibName, importc.}
 proc dos_qapplication_exec() {.cdecl, dynlib: dynLibName, importc.}
 proc dos_qapplication_quit() {.cdecl, dynlib: dynLibName, importc.}
 proc dos_qapplication_icon(filename: cstring) {.cdecl, dynlib: dynLibName, importc.}
@@ -141,7 +141,9 @@ proc dos_qapplication_installEventFilter(engine: DosQQmlApplicationEngine) {.cde
 proc dos_qguiapplication_create() {.cdecl, dynlib: dynLibName, importc.}
 proc dos_qguiapplication_exec() {.cdecl, dynlib: dynLibName, importc.}
 proc dos_qguiapplication_quit() {.cdecl, dynlib: dynLibName, importc.}
+proc dos_qguiapplication_icon(filename: cstring) {.cdecl, dynlib: dynLibName, importc.}
 proc dos_qguiapplication_delete() {.cdecl, dynlib: dynLibName, importc.}
+proc dos_qguiapplication_installEventFilter(engine: DosQQmlApplicationEngine) {.cdecl, dynlib: dynLibName, importc.}
 
 # QQmlContext
 proc dos_qqmlcontext_setcontextproperty(context: DosQQmlContext, propertyName: cstring, propertyValue: DosQVariant) {.cdecl, dynlib: dynLibName, importc.}
diff --git a/src/nimqml/private/qapplication.nim b/src/nimqml/private/qapplication.nim
index 10a1163..59cc74f 100644
--- a/src/nimqml/private/qapplication.nim
+++ b/src/nimqml/private/qapplication.nim
@@ -1,6 +1,6 @@
-proc setup*(application: QApplication, appName: string) =
+proc setup*(application: QApplication) =
   ## Setup a new QApplication
-  dos_qapplication_create(appName.cstring)
+  dos_qapplication_create()
   application.deleted = false
 
 proc exec*(application: QApplication) =
@@ -28,7 +28,7 @@ proc delete*(application: QApplication) =
   dos_qapplication_delete()
   application.deleted = true
 
-proc newQApplication*(appName: string = "Unknown"): QApplication =
+proc newQApplication*(): QApplication =
   ## Return a new QApplication
   new(result, delete)
-  result.setup(appName)
+  result.setup()
diff --git a/src/nimqml/private/qguiapplication.nim b/src/nimqml/private/qguiapplication.nim
index 8db82b2..53c3aa3 100644
--- a/src/nimqml/private/qguiapplication.nim
+++ b/src/nimqml/private/qguiapplication.nim
@@ -1,18 +1,26 @@
+import os
+
 proc setup*(self: QGuiApplication) =
-  ## Setup a new QApplication
+  ## Setup a new QGuiApplication
   dos_qguiapplication_create()
   self.deleted = false
 
 proc delete*(self: QGuiApplication) =
-  ## Delete the given QApplication
+  ## Delete the given QGuiApplication
   if self.deleted:
     return
-  debugMsg("QApplication", "delete")
+  debugMsg("QGuiApplication", "delete")
   dos_qguiapplication_delete()
   self.deleted = true
 
+proc icon*(application: QGuiApplication, filename: string) =
+  dos_qguiapplication_icon(filename.cstring)
+
+proc installEventFilter*(application: QGuiApplication, engine: QQmlApplicationEngine) =
+  dos_qguiapplication_installEventFilter(engine.vptr)
+
 proc newQGuiApplication*(): QGuiApplication =
-  ## Return a new QApplication
+  ## Return a new QGuiApplication
   new(result, delete)
   result.setup()