diff --git a/lib/graphicsdev/D3D11.cpp b/lib/graphicsdev/D3D11.cpp
index b623792..e3196d2 100644
--- a/lib/graphicsdev/D3D11.cpp
+++ b/lib/graphicsdev/D3D11.cpp
@@ -369,7 +369,7 @@ struct D3D11ShaderDataBinding : IShaderDataBinding
         {
             D3D11GraphicsBufferD* cbuf = static_cast<D3D11GraphicsBufferD*>(m_vbuf);
             ID3D11Buffer* buf[] = {cbuf->m_bufs[b].Get()};
-            UINT strides[] = {cbuf->m_stride};
+            UINT strides[] = {UINT(cbuf->m_stride)};
             UINT offsets[] = {0};
             ctx->IASetVertexBuffers(0, 1, buf, strides, offsets);
         }
@@ -377,7 +377,7 @@ struct D3D11ShaderDataBinding : IShaderDataBinding
         {
             D3D11GraphicsBufferS* cbuf = static_cast<D3D11GraphicsBufferS*>(m_vbuf);
             ID3D11Buffer* buf[] = {cbuf->m_buf.Get()};
-            UINT strides[] = {cbuf->m_stride};
+            UINT strides[] = {UINT(cbuf->m_stride)};
             UINT offsets[] = {0};
             ctx->IASetVertexBuffers(0, 1, buf, strides, offsets);
         }
@@ -573,7 +573,7 @@ struct D3D11CommandQueue : IGraphicsCommandQueue
 
     void setViewport(const SWindowRect& rect)
     {
-        D3D11_VIEWPORT vp = {rect.location[0], rect.location[1], rect.size[0], rect.size[1], 0.0, 1.0};
+        D3D11_VIEWPORT vp = {FLOAT(rect.location[0]), FLOAT(rect.location[1]), FLOAT(rect.size[0]), FLOAT(rect.size[1]), 0.0, 1.0};
         m_deferredCtx->RSSetViewports(1, &vp);
     }
 
diff --git a/lib/win/Win32Common.hpp b/lib/win/Win32Common.hpp
index 33a96fb..d359819 100644
--- a/lib/win/Win32Common.hpp
+++ b/lib/win/Win32Common.hpp
@@ -140,7 +140,7 @@ struct Boo3DAppContext
             D3D11Context::Window& win = m_ctx11.m_windows[window];
             BOOL isFScr;
             win.m_swapChain->GetFullscreenState(&isFScr, nullptr);
-            return isFScr;
+            return isFScr != 0;
         }
         OGLContext::Window& win = m_ctxOgl.m_windows[window];
         return win.m_fs;
diff --git a/lib/win/WindowWin32.cpp b/lib/win/WindowWin32.cpp
index 6a9ad0f..7ff051c 100644
--- a/lib/win/WindowWin32.cpp
+++ b/lib/win/WindowWin32.cpp
@@ -404,11 +404,11 @@ static uint32_t translateKeysym(WPARAM sym, int& specialSym, int& modifierSym)
 static int translateModifiers(UINT msg)
 {
     int retval = 0;
-    if (GetKeyState(VK_LSHIFT) & 0x8000 != 0 || GetKeyState(VK_RSHIFT) & 0x8000 != 0)
+    if ((GetKeyState(VK_LSHIFT) & 0x8000) != 0 || (GetKeyState(VK_RSHIFT) & 0x8000) != 0)
         retval |= MKEY_SHIFT;
-    if (GetKeyState(VK_LCONTROL) & 0x8000 != 0 || GetKeyState(VK_RCONTROL) & 0x8000 != 0)
+    if ((GetKeyState(VK_LCONTROL) & 0x8000) != 0 || (GetKeyState(VK_RCONTROL) & 0x8000) != 0)
         retval |= MKEY_CTRL;
-    if (GetKeyState(VK_MENU) & 0x8000 != 0)
+    if ((GetKeyState(VK_MENU) & 0x8000) != 0)
         retval |= MKEY_ALT;
     if (msg == WM_SYSKEYDOWN || msg == WM_SYSKEYUP)
         retval |= MKEY_ALT;
@@ -627,11 +627,11 @@ public:
                 uint32_t charCode = translateKeysym(e.wParam, specialKey, modifierKey);
                 int modifierMask = translateModifiers(e.uMsg);
                 if (charCode)
-                    m_callback->charKeyDown(charCode, EModifierKey(modifierMask), e.lParam & 0xffff != 0);
+                    m_callback->charKeyDown(charCode, EModifierKey(modifierMask), (e.lParam & 0xffff) != 0);
                 else if (specialKey)
-                    m_callback->specialKeyDown(ESpecialKey(specialKey), EModifierKey(modifierMask), e.lParam & 0xffff != 0);
+                    m_callback->specialKeyDown(ESpecialKey(specialKey), EModifierKey(modifierMask), (e.lParam & 0xffff) != 0);
                 else if (modifierKey)
-                    m_callback->modKeyDown(EModifierKey(modifierKey), e.lParam & 0xffff != 0);
+                    m_callback->modKeyDown(EModifierKey(modifierKey), (e.lParam & 0xffff) != 0);
             }
             return;
         }
@@ -793,11 +793,11 @@ public:
     {
         LONG sty = GetWindowLong(m_hwnd, GWL_STYLE);
         unsigned retval = STYLE_NONE;
-        if (sty & WS_CAPTION != 0)
+        if ((sty & WS_CAPTION) != 0)
             retval |= STYLE_TITLEBAR;
-        if (sty & WS_THICKFRAME != 0)
+        if ((sty & WS_THICKFRAME) != 0)
             retval |= STYLE_RESIZE;
-        if (sty & WS_SYSMENU)
+        if ((sty & WS_SYSMENU))
             retval |= STYLE_CLOSE;
         return EWindowStyle(retval);
     }