diff --git a/chunihook/dllmain.c b/chunihook/dllmain.c
index 6c1dcf7..b543402 100644
--- a/chunihook/dllmain.c
+++ b/chunihook/dllmain.c
@@ -30,6 +30,7 @@ static struct chuni_hook_config chuni_hook_cfg;
 static DWORD CALLBACK chuni_pre_startup(void)
 {
     HMODULE d3dc;
+    HRESULT hr;
 
     dprintf("--- Begin chuni_pre_startup ---\n");
 
@@ -54,15 +55,33 @@ static DWORD CALLBACK chuni_pre_startup(void)
 
     /* Initialize emulation hooks */
 
-    platform_hook_init(
+    hr = platform_hook_init(
             &chuni_hook_cfg.platform,
             "SDBT",
             "AAV1",
             chuni_hook_mod);
 
-    amex_hook_init(&chuni_hook_cfg.amex, chunithm_jvs_init);
-    slider_hook_init(&chuni_hook_cfg.slider);
-    sg_reader_hook_init(&chuni_hook_cfg.aime, 12);
+    if (FAILED(hr)) {
+        return EXIT_FAILURE;
+    }
+
+    hr = amex_hook_init(&chuni_hook_cfg.amex, chunithm_jvs_init);
+
+    if (FAILED(hr)) {
+        return EXIT_FAILURE;
+    }
+
+    hr = slider_hook_init(&chuni_hook_cfg.slider);
+
+    if (FAILED(hr)) {
+        return EXIT_FAILURE;
+    }
+
+    hr = sg_reader_hook_init(&chuni_hook_cfg.aime, 12);
+
+    if (FAILED(hr)) {
+        return EXIT_FAILURE;
+    }
 
     /* Initialize debug helpers */
 
diff --git a/divahook/dllmain.c b/divahook/dllmain.c
index 59e11ca..a194f84 100644
--- a/divahook/dllmain.c
+++ b/divahook/dllmain.c
@@ -27,6 +27,8 @@ static struct diva_hook_config diva_hook_cfg;
 
 static DWORD CALLBACK diva_pre_startup(void)
 {
+    HRESULT hr;
+
     dprintf("--- Begin diva_pre_startup ---\n");
 
     /* Config load */
@@ -39,15 +41,33 @@ static DWORD CALLBACK diva_pre_startup(void)
 
     /* Initialize emulation hooks */
 
-    platform_hook_init(
+    hr = platform_hook_init(
             &diva_hook_cfg.platform,
             "SBZV",
             "AAV0",
             diva_hook_mod);
 
-    amex_hook_init(&diva_hook_cfg.amex, diva_jvs_init);
-    sg_reader_hook_init(&diva_hook_cfg.aime, 10);
-    slider_hook_init();
+    if (FAILED(hr)) {
+        return EXIT_FAILURE;
+    }
+
+    hr = amex_hook_init(&diva_hook_cfg.amex, diva_jvs_init);
+
+    if (FAILED(hr)) {
+        return EXIT_FAILURE;
+    }
+
+    hr = sg_reader_hook_init(&diva_hook_cfg.aime, 10);
+
+    if (FAILED(hr)) {
+        return EXIT_FAILURE;
+    }
+
+    hr = slider_hook_init();
+
+    if (FAILED(hr)) {
+        return EXIT_FAILURE;
+    }
 
     /* Initialize debug helpers */
 
diff --git a/idzhook/dllmain.c b/idzhook/dllmain.c
index c02b991..a54e4bd 100644
--- a/idzhook/dllmain.c
+++ b/idzhook/dllmain.c
@@ -27,6 +27,8 @@ static struct idz_hook_config idz_hook_cfg;
 
 static DWORD CALLBACK idz_pre_startup(void)
 {
+    HRESULT hr;
+
     dprintf("--- Begin idz_pre_startup ---\n");
 
     /* Config load */
@@ -40,9 +42,27 @@ static DWORD CALLBACK idz_pre_startup(void)
 
     /* Initialize emulation hooks */
 
-    platform_hook_init(&idz_hook_cfg.platform, "SDDF", "AAV2", idz_hook_mod);
-    amex_hook_init(&idz_hook_cfg.amex, idz_jvs_init);
-    sg_reader_hook_init(&idz_hook_cfg.aime, 10);
+    hr = platform_hook_init(
+            &idz_hook_cfg.platform,
+            "SDDF",
+            "AAV2",
+            idz_hook_mod);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
+    hr = amex_hook_init(&idz_hook_cfg.amex, idz_jvs_init);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
+    hr = sg_reader_hook_init(&idz_hook_cfg.aime, 10);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
 
     /* Initialize debug helpers */
 
diff --git a/mu3hook/dllmain.c b/mu3hook/dllmain.c
index 11a0fbc..c34bc51 100644
--- a/mu3hook/dllmain.c
+++ b/mu3hook/dllmain.c
@@ -22,6 +22,8 @@ static struct mu3_hook_config mu3_hook_cfg;
 
 static DWORD CALLBACK mu3_pre_startup(void)
 {
+    HRESULT hr;
+
     dprintf("--- Begin mu3_pre_startup ---\n");
 
     /* Load config */
@@ -34,10 +36,33 @@ static DWORD CALLBACK mu3_pre_startup(void)
 
     /* Initialize emulation hooks */
 
-    platform_hook_init(&mu3_hook_cfg.platform, "SDDT", "AAV2", mu3_hook_mod);
-    sg_reader_hook_init(&mu3_hook_cfg.aime, 1);
-    vfd_hook_init(2);
-    mu3_io4_hook_init();
+    hr = platform_hook_init(
+            &mu3_hook_cfg.platform,
+            "SDDT",
+            "AAV2",
+            mu3_hook_mod);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
+    hr = sg_reader_hook_init(&mu3_hook_cfg.aime, 1);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
+    hr = vfd_hook_init(2);
+
+    if (FAILED(hr)) {
+        return hr;
+    }
+
+    hr = mu3_io4_hook_init();
+
+    if (FAILED(hr)) {
+        return hr;
+    }
 
     /* Initialize debug helpers */