diff --git a/agent/src/capture/display.rs b/agent/src/capture/display.rs
index 048b95e..52c4ae2 100644
--- a/agent/src/capture/display.rs
+++ b/agent/src/capture/display.rs
@@ -78,12 +78,15 @@ pub fn enumerate_displays() -> Result<Vec<Display>> {
     // Collect all monitor handles
     let mut monitors: Vec<(windows::Win32::Graphics::Gdi::HMONITOR, u32)> = Vec::new();
     unsafe {
-        EnumDisplayMonitors(
+        let result = EnumDisplayMonitors(
             None,
             None,
             Some(enum_callback),
             LPARAM(&mut monitors as *mut _ as isize),
-        )?;
+        );
+        if !result.as_bool() {
+            anyhow::bail!("EnumDisplayMonitors failed");
+        }
     }
 
     // Get detailed info for each monitor
diff --git a/agent/src/capture/dxgi.rs b/agent/src/capture/dxgi.rs
index 18dedc6..c10e361 100644
--- a/agent/src/capture/dxgi.rs
+++ b/agent/src/capture/dxgi.rs
@@ -13,7 +13,7 @@ use std::time::Instant;
 use windows::Win32::Graphics::Direct3D::D3D_DRIVER_TYPE_UNKNOWN;
 use windows::Win32::Graphics::Direct3D11::{
     D3D11CreateDevice, ID3D11Device, ID3D11DeviceContext, ID3D11Texture2D,
-    D3D11_CPU_ACCESS_READ, D3D11_SDK_VERSION, D3D11_TEXTURE2D_DESC,
+    D3D11_CPU_ACCESS_FLAG, D3D11_SDK_VERSION, D3D11_TEXTURE2D_DESC,
     D3D11_USAGE_STAGING, D3D11_MAPPED_SUBRESOURCE, D3D11_MAP_READ,
 };
 use windows::Win32::Graphics::Dxgi::{
@@ -169,12 +169,15 @@ impl DxgiCapturer {
 
                 desc.Usage = D3D11_USAGE_STAGING;
                 desc.BindFlags = Default::default();
-                desc.CPUAccessFlags = D3D11_CPU_ACCESS_READ;
+                desc.CPUAccessFlags = D3D11_CPU_ACCESS_FLAG(0x20000); // D3D11_CPU_ACCESS_READ
                 desc.MiscFlags = Default::default();
 
-                let staging = self.device.CreateTexture2D(&desc, None)
+                let mut staging: Option<ID3D11Texture2D> = None;
+                self.device.CreateTexture2D(&desc, None, Some(&mut staging))
                     .context("Failed to create staging texture")?;
 
+                let staging = staging.context("Staging texture is None")?;
+
                 // Set high priority
                 let resource: IDXGIResource = staging.cast()?;
                 resource.SetEvictionPriority(DXGI_RESOURCE_PRIORITY_MAXIMUM.0)?;
diff --git a/agent/src/capture/gdi.rs b/agent/src/capture/gdi.rs
index 0e85225..6fc67d0 100644
--- a/agent/src/capture/gdi.rs
+++ b/agent/src/capture/gdi.rs
@@ -4,7 +4,7 @@
 //! Slower than DXGI but works on older systems and edge cases.
 
 use super::{CapturedFrame, Capturer, Display};
-use anyhow::{Context, Result};
+use anyhow::Result;
 use std::time::Instant;
 
 use windows::Win32::Graphics::Gdi::{
@@ -58,7 +58,7 @@ impl GdiCapturer {
             let old_bitmap = SelectObject(mem_dc, bitmap);
 
             // Copy screen to memory DC
-            let result = BitBlt(
+            if let Err(e) = BitBlt(
                 mem_dc,
                 0,
                 0,
@@ -68,14 +68,12 @@ impl GdiCapturer {
                 self.display.x,
                 self.display.y,
                 SRCCOPY,
-            );
-
-            if !result.as_bool() {
+            ) {
                 SelectObject(mem_dc, old_bitmap);
                 DeleteObject(bitmap);
                 DeleteDC(mem_dc);
                 ReleaseDC(HWND::default(), screen_dc);
-                anyhow::bail!("BitBlt failed");
+                anyhow::bail!("BitBlt failed: {}", e);
             }
 
             // Prepare bitmap info for GetDIBits
diff --git a/agent/src/input/keyboard.rs b/agent/src/input/keyboard.rs
index 6d20a00..1b31e1f 100644
--- a/agent/src/input/keyboard.rs
+++ b/agent/src/input/keyboard.rs
@@ -81,9 +81,11 @@ impl KeyboardController {
     #[cfg(windows)]
     pub fn type_char(&mut self, ch: char) -> Result<()> {
         let mut inputs = Vec::new();
+        let mut buf = [0u16; 2];
+        let encoded = ch.encode_utf16(&mut buf);
 
         // For characters that fit in a single u16
-        for code_unit in ch.encode_utf16(&mut [0; 2]) {
+        for &code_unit in encoded {
             // Key down
             inputs.push(INPUT {
                 r#type: INPUT_KEYBOARD,
diff --git a/agent/src/input/mouse.rs b/agent/src/input/mouse.rs
index 02d95d8..29c3945 100644
--- a/agent/src/input/mouse.rs
+++ b/agent/src/input/mouse.rs
@@ -8,9 +8,15 @@ use windows::Win32::UI::Input::KeyboardAndMouse::{
     SendInput, INPUT, INPUT_0, INPUT_MOUSE, MOUSEEVENTF_ABSOLUTE, MOUSEEVENTF_HWHEEL,
     MOUSEEVENTF_LEFTDOWN, MOUSEEVENTF_LEFTUP, MOUSEEVENTF_MIDDLEDOWN, MOUSEEVENTF_MIDDLEUP,
     MOUSEEVENTF_MOVE, MOUSEEVENTF_RIGHTDOWN, MOUSEEVENTF_RIGHTUP, MOUSEEVENTF_VIRTUALDESK,
-    MOUSEEVENTF_WHEEL, MOUSEEVENTF_XDOWN, MOUSEEVENTF_XUP, MOUSEINPUT, XBUTTON1, XBUTTON2,
+    MOUSEEVENTF_WHEEL, MOUSEEVENTF_XDOWN, MOUSEEVENTF_XUP, MOUSEINPUT,
 };
 
+// X button constants (not exported in windows crate 0.58+)
+#[cfg(windows)]
+const XBUTTON1: u32 = 0x0001;
+#[cfg(windows)]
+const XBUTTON2: u32 = 0x0002;
+
 #[cfg(windows)]
 use windows::Win32::UI::WindowsAndMessaging::{
     GetSystemMetrics, SM_CXVIRTUALSCREEN, SM_CYVIRTUALSCREEN, SM_XVIRTUALSCREEN,
@@ -86,8 +92,8 @@ impl MouseController {
             MouseButton::Left => (MOUSEEVENTF_LEFTDOWN, 0),
             MouseButton::Right => (MOUSEEVENTF_RIGHTDOWN, 0),
             MouseButton::Middle => (MOUSEEVENTF_MIDDLEDOWN, 0),
-            MouseButton::X1 => (MOUSEEVENTF_XDOWN, XBUTTON1 as u32),
-            MouseButton::X2 => (MOUSEEVENTF_XDOWN, XBUTTON2 as u32),
+            MouseButton::X1 => (MOUSEEVENTF_XDOWN, XBUTTON1),
+            MouseButton::X2 => (MOUSEEVENTF_XDOWN, XBUTTON2),
         };
 
         let input = INPUT {
@@ -114,8 +120,8 @@ impl MouseController {
             MouseButton::Left => (MOUSEEVENTF_LEFTUP, 0),
             MouseButton::Right => (MOUSEEVENTF_RIGHTUP, 0),
             MouseButton::Middle => (MOUSEEVENTF_MIDDLEUP, 0),
-            MouseButton::X1 => (MOUSEEVENTF_XUP, XBUTTON1 as u32),
-            MouseButton::X2 => (MOUSEEVENTF_XUP, XBUTTON2 as u32),
+            MouseButton::X1 => (MOUSEEVENTF_XUP, XBUTTON1),
+            MouseButton::X2 => (MOUSEEVENTF_XUP, XBUTTON2),
         };
 
         let input = INPUT {