diff --git a/examples/imgui_impl_dx10.cpp b/examples/imgui_impl_dx10.cpp
index 8d2c647..235428f 100644
--- a/examples/imgui_impl_dx10.cpp
+++ b/examples/imgui_impl_dx10.cpp
@@ -500,6 +500,7 @@
             }
     if (pDXGIDevice) pDXGIDevice->Release();
     if (pDXGIAdapter) pDXGIAdapter->Release();
+    g_pd3dDevice->AddRef();
 
     return true;
 }
@@ -508,7 +509,7 @@
 {
     ImGui_ImplDX10_InvalidateDeviceObjects();
     if (g_pFactory) { g_pFactory->Release(); g_pFactory = NULL; }
-    g_pd3dDevice = NULL;
+    if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = NULL; }
 }
 
 void ImGui_ImplDX10_NewFrame()

diff --git a/examples/imgui_impl_dx10.cpp b/examples/imgui_impl_dx10.cpp
index 8d2c647..235428f 100644
--- a/examples/imgui_impl_dx10.cpp
+++ b/examples/imgui_impl_dx10.cpp
@@ -500,6 +500,7 @@
             }
     if (pDXGIDevice) pDXGIDevice->Release();
     if (pDXGIAdapter) pDXGIAdapter->Release();
+    g_pd3dDevice->AddRef();
 
     return true;
 }
@@ -508,7 +509,7 @@
 {
     ImGui_ImplDX10_InvalidateDeviceObjects();
     if (g_pFactory) { g_pFactory->Release(); g_pFactory = NULL; }
-    g_pd3dDevice = NULL;
+    if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = NULL; }
 }
 
 void ImGui_ImplDX10_NewFrame()
diff --git a/examples/imgui_impl_dx11.cpp b/examples/imgui_impl_dx11.cpp
index 9a44d6a..18c32e6 100644
--- a/examples/imgui_impl_dx11.cpp
+++ b/examples/imgui_impl_dx11.cpp
@@ -508,6 +508,8 @@
             }
     if (pDXGIDevice) pDXGIDevice->Release();
     if (pDXGIAdapter) pDXGIAdapter->Release();
+    g_pd3dDevice->AddRef();
+    g_pd3dDeviceContext->AddRef();
 
     return true;
 }
@@ -516,8 +518,8 @@
 {
     ImGui_ImplDX11_InvalidateDeviceObjects();
     if (g_pFactory) { g_pFactory->Release(); g_pFactory = NULL; }
-    g_pd3dDevice = NULL;
-    g_pd3dDeviceContext = NULL;
+    if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = NULL; }
+    if (g_pd3dDeviceContext) { g_pd3dDeviceContext->Release(); g_pd3dDeviceContext = NULL; }
 }
 
 void ImGui_ImplDX11_NewFrame()

diff --git a/examples/imgui_impl_dx10.cpp b/examples/imgui_impl_dx10.cpp
index 8d2c647..235428f 100644
--- a/examples/imgui_impl_dx10.cpp
+++ b/examples/imgui_impl_dx10.cpp
@@ -500,6 +500,7 @@
             }
     if (pDXGIDevice) pDXGIDevice->Release();
     if (pDXGIAdapter) pDXGIAdapter->Release();
+    g_pd3dDevice->AddRef();
 
     return true;
 }
@@ -508,7 +509,7 @@
 {
     ImGui_ImplDX10_InvalidateDeviceObjects();
     if (g_pFactory) { g_pFactory->Release(); g_pFactory = NULL; }
-    g_pd3dDevice = NULL;
+    if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = NULL; }
 }
 
 void ImGui_ImplDX10_NewFrame()
diff --git a/examples/imgui_impl_dx11.cpp b/examples/imgui_impl_dx11.cpp
index 9a44d6a..18c32e6 100644
--- a/examples/imgui_impl_dx11.cpp
+++ b/examples/imgui_impl_dx11.cpp
@@ -508,6 +508,8 @@
             }
     if (pDXGIDevice) pDXGIDevice->Release();
     if (pDXGIAdapter) pDXGIAdapter->Release();
+    g_pd3dDevice->AddRef();
+    g_pd3dDeviceContext->AddRef();
 
     return true;
 }
@@ -516,8 +518,8 @@
 {
     ImGui_ImplDX11_InvalidateDeviceObjects();
     if (g_pFactory) { g_pFactory->Release(); g_pFactory = NULL; }
-    g_pd3dDevice = NULL;
-    g_pd3dDeviceContext = NULL;
+    if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = NULL; }
+    if (g_pd3dDeviceContext) { g_pd3dDeviceContext->Release(); g_pd3dDeviceContext = NULL; }
 }
 
 void ImGui_ImplDX11_NewFrame()
diff --git a/examples/imgui_impl_dx9.cpp b/examples/imgui_impl_dx9.cpp
index f375c39..fd4522c 100644
--- a/examples/imgui_impl_dx9.cpp
+++ b/examples/imgui_impl_dx9.cpp
@@ -219,13 +219,14 @@
     io.BackendRendererName = "imgui_impl_dx9";
 
     g_pd3dDevice = device;
+    g_pd3dDevice->AddRef();
     return true;
 }
 
 void ImGui_ImplDX9_Shutdown()
 {
     ImGui_ImplDX9_InvalidateDeviceObjects();
-    g_pd3dDevice = NULL;
+    if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = NULL; }
 }
 
 static bool ImGui_ImplDX9_CreateFontsTexture()