allow setting initial window style

losttech · Jun 25, 2023 · fd43818 · fd43818
1 parent 1d19d45
commit fd43818
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Showing 3 changed files with 19 additions and 1 deletion.
diff --git a/src/NDetours.csproj b/src/NDetours.csproj
@@ -8,7 +8,7 @@
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
 
     <!-- Package stuff -->
-    <Version>0.0.7</Version>
+    <Version>0.0.8</Version>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <Description>Managed package that simplifies injection of Detours-based DLLs</Description>
@@ -36,6 +36,7 @@
     <!-- The following is recommended for public projects -->
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
     <PackageReference Include="PInvoke.Kernel32" Version="0.7.124" />
+    <PackageReference Include="PInvoke.User32" Version="0.7.124" />
   </ItemGroup>
 
 </Project>
diff --git a/src/ProcessDetour.cs b/src/ProcessDetour.cs
@@ -35,6 +35,10 @@ public static unsafe Process Start(StartInfo startInfo) {
         var startupInfo = new Kernel32.STARTUPINFO {
             cb = sizeof(Kernel32.STARTUPINFO),
         };
+        if (startInfo.ShowWindow is { } style) {
+            startupInfo.dwFlags |= Kernel32.StartupInfoFlags.STARTF_USESHOWWINDOW;
+            startupInfo.wShowWindow = (ushort)style;
+        }
         Kernel32.PROCESS_INFORMATION processInfo;
         var flags = startInfo.Flags;
         var dlls = new StrPtr[startInfo.InjectDlls.Count];

diff --git a/src/StartInfo.cs b/src/StartInfo.cs
@@ -3,6 +3,7 @@
 using System.Collections.ObjectModel;
 
 using static PInvoke.Kernel32;
+using static PInvoke.User32;
 
 partial class ProcessDetour {
     public sealed class StartInfo {
@@ -13,6 +14,18 @@ public sealed class StartInfo {
         public IDictionary<string, string>? Environment { get; set; }
         public CreateProcessFlags Flags { get; set; } = CreateProcessFlags.None;
 
+        WindowShowStyle showWindow = WindowShowStyle.SW_SHOWDEFAULT;
+        public WindowShowStyle? ShowWindow {
+            get => this.showWindow == WindowShowStyle.SW_SHOWDEFAULT
+                    ? null : this.showWindow;
+            set {
+                if (value == WindowShowStyle.SW_SHOWDEFAULT)
+                    throw new ArgumentException($"{nameof(WindowShowStyle.SW_SHOWDEFAULT)} can not be used when starting new process.");
+
+                this.showWindow = value ?? WindowShowStyle.SW_SHOWDEFAULT;
+            }
+        }
+
         public StartInfo(string executable) {
             this.Executable = executable ?? throw new ArgumentNullException(nameof(executable));
         }