diff --git a/NEWS.md b/NEWS.md
index a7cfe6c5..0679e1f5 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -7,6 +7,7 @@ Red Panda C++ Version 2.1
   - enhancement: add "goto block start"/"goto block end" in "Code" menu
   - add fmtlib to the gcc compiler's lib distributed with RedPanda IDE windows version
   - add default autolink for fmtlib in Windows 
+  - reduce size of the executable of win-git-askpass tool
 
 Red Panda C++ Version 2.0
 
diff --git a/RedPandaIDE/RedPandaIDE.pro b/RedPandaIDE/RedPandaIDE.pro
index 01fb946e..c99aa3c9 100644
--- a/RedPandaIDE/RedPandaIDE.pro
+++ b/RedPandaIDE/RedPandaIDE.pro
@@ -68,6 +68,11 @@ gcc | clang {
 LIBS += $$OUT_PWD/../libs/qsynedit/$${OBJ_OUT_PWD}libqsynedit.a \
         $$OUT_PWD/../libs/redpanda_qt_utils/$${OBJ_OUT_PWD}libredpanda_qt_utils.a
 }
+msvc {
+LIBS += $$OUT_PWD/../libs/qsynedit/$${OBJ_OUT_PWD}qsynedit.lib \
+        $$OUT_PWD/../libs/redpanda_qt_utils/$${OBJ_OUT_PWD}redpanda_qt_utils.lib
+LIBS += advapi32.lib user32.lib
+}
 
 SOURCES += \
     HighlighterManager.cpp \
diff --git a/RedPandaIDE/mainwindow.h b/RedPandaIDE/mainwindow.h
index f0a62c9a..3a98a749 100644
--- a/RedPandaIDE/mainwindow.h
+++ b/RedPandaIDE/mainwindow.h
@@ -67,7 +67,7 @@ class CPUDialog;
 class QPlainTextEdit;
 class SearchDialog;
 class Project;
-class ProjectModelNode;
+struct ProjectModelNode;
 class ProjectUnit;
 class ColorSchemeItem;
 class VisitHistoryManager;
diff --git a/RedPandaIDE/widgets/aboutdialog.cpp b/RedPandaIDE/widgets/aboutdialog.cpp
index 0da1b9e1..86ebb55b 100644
--- a/RedPandaIDE/widgets/aboutdialog.cpp
+++ b/RedPandaIDE/widgets/aboutdialog.cpp
@@ -35,6 +35,10 @@ AboutDialog::AboutDialog(QWidget *parent) :
             .arg(QString("GCC %1.%2")
                  .arg(__GNUC__)
                  .arg(__GNUC_MINOR__)));
+#elif defined(_MSC_VER)
+    ui->lblQt->setText(ui->lblQt->text()
+            .arg(qVersion())
+            .arg(tr("Microsoft Visual C++")));
 #else
     ui->lblQt->setText(ui->lblQt->text()
             .arg(qVersion())
diff --git a/libs/qsynedit/qsynedit/TextBuffer.cpp b/libs/qsynedit/qsynedit/TextBuffer.cpp
index 011c4a41..fb97aa01 100644
--- a/libs/qsynedit/qsynedit/TextBuffer.cpp
+++ b/libs/qsynedit/qsynedit/TextBuffer.cpp
@@ -688,7 +688,7 @@ void Document::saveToFile(QFile &file, const QByteArray& encoding,
     if (allAscii) {
         realEncoding = ENCODING_ASCII;
     } else if (encoding == ENCODING_AUTO_DETECT) {
-        if (codec->name() == "System") {
+        if (codec->name().compare("System",Qt::CaseInsensitive)) {
             realEncoding = pCharsetInfoManager->getDefaultSystemEncoding();
         } else {
             realEncoding = codec->name();
diff --git a/libs/qsynedit/qsynedit/TextBuffer.h b/libs/qsynedit/qsynedit/TextBuffer.h
index c33aa024..8262de4b 100644
--- a/libs/qsynedit/qsynedit/TextBuffer.h
+++ b/libs/qsynedit/qsynedit/TextBuffer.h
@@ -250,8 +250,8 @@ protected:
     QVector<PUndoItem> mItems;
     int mMaxUndoActions;
     int mMaxMemoryUsage;
-    size_t mNextChangeNumber;
-    size_t mInitialChangeNumber;
+    unsigned int mNextChangeNumber;
+    unsigned int mInitialChangeNumber;
     bool mInsideRedo;
 };
 
diff --git a/tools/astyle/astyle.pro b/tools/astyle/astyle.pro
index 81569346..5f64b506 100644
--- a/tools/astyle/astyle.pro
+++ b/tools/astyle/astyle.pro
@@ -7,6 +7,10 @@ isEmpty(APP_NAME) {
 CONFIG += c++11 console
 CONFIG -= app_bundle
 
+msvc {
+CONFIG += windows
+}
+
 # You can make your code fail to compile if it uses deprecated APIs.
 # In order to do so, uncomment the following line.
 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
diff --git a/tools/consolepauser/consolepauser.pro b/tools/consolepauser/consolepauser.pro
index 6fcf7b56..db228e0e 100644
--- a/tools/consolepauser/consolepauser.pro
+++ b/tools/consolepauser/consolepauser.pro
@@ -3,6 +3,10 @@ QT -= gui
 CONFIG += c++11 console
 CONFIG -= app_bundle
 
+msvc {
+    CONFIG += windows
+}
+
 isEmpty(APP_NAME) {
     APP_NAME = RedPandaCPP
 }
diff --git a/tools/redpanda-win-git-askpass/redpanda-win-git-askpass.pro b/tools/redpanda-win-git-askpass/redpanda-win-git-askpass.pro
index 93f1b055..6faf23b8 100644
--- a/tools/redpanda-win-git-askpass/redpanda-win-git-askpass.pro
+++ b/tools/redpanda-win-git-askpass/redpanda-win-git-askpass.pro
@@ -3,6 +3,10 @@ CONFIG -= qt
 CONFIG += c++11
 CONFIG -= app_bundle
 
+msvc {
+    LIBS += advapi32.lib shell32.lib comdlg32.lib user32.lib gdi32.lib ws2_32.lib
+}
+
 DEFINES -= UNICODE
 
 isEmpty(APP_NAME) {