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How can a 32-bit program detect that it is launched in a 64-bit Windows?

, 21 Mar 2012 CPOL
A 32-bit program can find out if it is launched in WoW64 with the help of the IsWow64Process function.
IsWow64Process_example.zip
IsWow64Process_example
<?xml version="1.0" encoding="windows-1251"?>
<VisualStudioProject
	ProjectType="Visual C++"
	Version="8,00"
	Name="IsWow64Process"
	ProjectGUID="{C8F443E8-51AF-41D7-9BAD-FA9E7E14AB1D}"
	RootNamespace="IsWow64Process"
	Keyword="Win32Proj"
	>
	<Platforms>
		<Platform
			Name="Win32"
		/>
		<Platform
			Name="x64"
		/>
	</Platforms>
	<ToolFiles>
	</ToolFiles>
	<Configurations>
		<Configuration
			Name="Debug|Win32"
			OutputDirectory="$(SolutionDir)$(ConfigurationName)"
			IntermediateDirectory="$(ConfigurationName)"
			ConfigurationType="1"
			CharacterSet="1"
			>
			<Tool
				Name="VCPreBuildEventTool"
			/>
			<Tool
				Name="VCCustomBuildTool"
			/>
			<Tool
				Name="VCXMLDataGeneratorTool"
			/>
			<Tool
				Name="VCWebServiceProxyGeneratorTool"
			/>
			<Tool
				Name="VCMIDLTool"
			/>
			<Tool
				Name="VCCLCompilerTool"
				Optimization="0"
				PreprocessorDefinitions="WIN32;_DEBUG;_CONSOLE"
				MinimalRebuild="true"
				BasicRuntimeChecks="3"
				RuntimeLibrary="3"
				UsePrecompiledHeader="2"
				WarningLevel="3"
				Detect64BitPortabilityProblems="true"
				DebugInformationFormat="4"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
			/>
			<Tool
				Name="VCResourceCompilerTool"
			/>
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				Name="VCPreLinkEventTool"
			/>
			<Tool
				Name="VCLinkerTool"
				LinkIncremental="2"
				GenerateDebugInformation="true"
				SubSystem="1"
				TargetMachine="1"
			/>
			<Tool
				Name="VCALinkTool"
			/>
			<Tool
				Name="VCManifestTool"
			/>
			<Tool
				Name="VCXDCMakeTool"
			/>
			<Tool
				Name="VCBscMakeTool"
			/>
			<Tool
				Name="VCFxCopTool"
			/>
			<Tool
				Name="VCAppVerifierTool"
			/>
			<Tool
				Name="VCWebDeploymentTool"
			/>
			<Tool
				Name="VCPostBuildEventTool"
			/>
		</Configuration>
		<Configuration
			Name="Debug|x64"
			OutputDirectory="$(SolutionDir)$(PlatformName)\$(ConfigurationName)"
			IntermediateDirectory="$(PlatformName)\$(ConfigurationName)"
			ConfigurationType="1"
			CharacterSet="1"
			>
			<Tool
				Name="VCPreBuildEventTool"
			/>
			<Tool
				Name="VCCustomBuildTool"
			/>
			<Tool
				Name="VCXMLDataGeneratorTool"
			/>
			<Tool
				Name="VCWebServiceProxyGeneratorTool"
			/>
			<Tool
				Name="VCMIDLTool"
				TargetEnvironment="3"
			/>
			<Tool
				Name="VCCLCompilerTool"
				Optimization="0"
				PreprocessorDefinitions="WIN32;_DEBUG;_CONSOLE"
				MinimalRebuild="true"
				BasicRuntimeChecks="3"
				RuntimeLibrary="3"
				UsePrecompiledHeader="2"
				WarningLevel="3"
				Detect64BitPortabilityProblems="true"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
			/>
			<Tool
				Name="VCResourceCompilerTool"
			/>
			<Tool
				Name="VCPreLinkEventTool"
			/>
			<Tool
				Name="VCLinkerTool"
				LinkIncremental="2"
				GenerateDebugInformation="true"
				SubSystem="1"
				TargetMachine="17"
			/>
			<Tool
				Name="VCALinkTool"
			/>
			<Tool
				Name="VCManifestTool"
			/>
			<Tool
				Name="VCXDCMakeTool"
			/>
			<Tool
				Name="VCBscMakeTool"
			/>
			<Tool
				Name="VCFxCopTool"
			/>
			<Tool
				Name="VCAppVerifierTool"
			/>
			<Tool
				Name="VCWebDeploymentTool"
			/>
			<Tool
				Name="VCPostBuildEventTool"
			/>
		</Configuration>
		<Configuration
			Name="Release|Win32"
			OutputDirectory="$(SolutionDir)$(ConfigurationName)"
			IntermediateDirectory="$(ConfigurationName)"
			ConfigurationType="1"
			CharacterSet="1"
			WholeProgramOptimization="1"
			>
			<Tool
				Name="VCPreBuildEventTool"
			/>
			<Tool
				Name="VCCustomBuildTool"
			/>
			<Tool
				Name="VCXMLDataGeneratorTool"
			/>
			<Tool
				Name="VCWebServiceProxyGeneratorTool"
			/>
			<Tool
				Name="VCMIDLTool"
			/>
			<Tool
				Name="VCCLCompilerTool"
				PreprocessorDefinitions="WIN32;NDEBUG;_CONSOLE"
				RuntimeLibrary="2"
				UsePrecompiledHeader="2"
				WarningLevel="3"
				Detect64BitPortabilityProblems="true"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
			/>
			<Tool
				Name="VCResourceCompilerTool"
			/>
			<Tool
				Name="VCPreLinkEventTool"
			/>
			<Tool
				Name="VCLinkerTool"
				LinkIncremental="1"
				GenerateDebugInformation="true"
				SubSystem="1"
				OptimizeReferences="2"
				EnableCOMDATFolding="2"
				TargetMachine="1"
			/>
			<Tool
				Name="VCALinkTool"
			/>
			<Tool
				Name="VCManifestTool"
			/>
			<Tool
				Name="VCXDCMakeTool"
			/>
			<Tool
				Name="VCBscMakeTool"
			/>
			<Tool
				Name="VCFxCopTool"
			/>
			<Tool
				Name="VCAppVerifierTool"
			/>
			<Tool
				Name="VCWebDeploymentTool"
			/>
			<Tool
				Name="VCPostBuildEventTool"
			/>
		</Configuration>
		<Configuration
			Name="Release|x64"
			OutputDirectory="$(SolutionDir)$(PlatformName)\$(ConfigurationName)"
			IntermediateDirectory="$(PlatformName)\$(ConfigurationName)"
			ConfigurationType="1"
			CharacterSet="1"
			WholeProgramOptimization="1"
			>
			<Tool
				Name="VCPreBuildEventTool"
			/>
			<Tool
				Name="VCCustomBuildTool"
			/>
			<Tool
				Name="VCXMLDataGeneratorTool"
			/>
			<Tool
				Name="VCWebServiceProxyGeneratorTool"
			/>
			<Tool
				Name="VCMIDLTool"
				TargetEnvironment="3"
			/>
			<Tool
				Name="VCCLCompilerTool"
				PreprocessorDefinitions="WIN32;NDEBUG;_CONSOLE"
				RuntimeLibrary="2"
				UsePrecompiledHeader="2"
				WarningLevel="3"
				Detect64BitPortabilityProblems="true"
				DebugInformationFormat="3"
			/>
			<Tool
				Name="VCManagedResourceCompilerTool"
			/>
			<Tool
				Name="VCResourceCompilerTool"
			/>
			<Tool
				Name="VCPreLinkEventTool"
			/>
			<Tool
				Name="VCLinkerTool"
				LinkIncremental="1"
				GenerateDebugInformation="true"
				SubSystem="1"
				OptimizeReferences="2"
				EnableCOMDATFolding="2"
				TargetMachine="17"
			/>
			<Tool
				Name="VCALinkTool"
			/>
			<Tool
				Name="VCManifestTool"
			/>
			<Tool
				Name="VCXDCMakeTool"
			/>
			<Tool
				Name="VCBscMakeTool"
			/>
			<Tool
				Name="VCFxCopTool"
			/>
			<Tool
				Name="VCAppVerifierTool"
			/>
			<Tool
				Name="VCWebDeploymentTool"
			/>
			<Tool
				Name="VCPostBuildEventTool"
			/>
		</Configuration>
	</Configurations>
	<References>
	</References>
	<Files>
		<Filter
			Name="Source Files"
			Filter="cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx"
			UniqueIdentifier="{4FC737F1-C7A5-4376-A066-2A32D752A2FF}"
			>
			<File
				RelativePath=".\IsWow64Process.cpp"
				>
				<FileConfiguration
					Name="Debug|Win32"
					>
					<Tool
						Name="VCCLCompilerTool"
						WarningLevel="4"
					/>
				</FileConfiguration>
				<FileConfiguration
					Name="Debug|x64"
					>
					<Tool
						Name="VCCLCompilerTool"
						WarningLevel="4"
					/>
				</FileConfiguration>
				<FileConfiguration
					Name="Release|Win32"
					>
					<Tool
						Name="VCCLCompilerTool"
						WarningLevel="4"
					/>
				</FileConfiguration>
				<FileConfiguration
					Name="Release|x64"
					>
					<Tool
						Name="VCCLCompilerTool"
						WarningLevel="4"
					/>
				</FileConfiguration>
			</File>
			<File
				RelativePath=".\stdafx.cpp"
				>
				<FileConfiguration
					Name="Debug|Win32"
					>
					<Tool
						Name="VCCLCompilerTool"
						UsePrecompiledHeader="1"
						WarningLevel="4"
					/>
				</FileConfiguration>
				<FileConfiguration
					Name="Debug|x64"
					>
					<Tool
						Name="VCCLCompilerTool"
						UsePrecompiledHeader="1"
						WarningLevel="4"
					/>
				</FileConfiguration>
				<FileConfiguration
					Name="Release|Win32"
					>
					<Tool
						Name="VCCLCompilerTool"
						UsePrecompiledHeader="1"
						WarningLevel="4"
					/>
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				<FileConfiguration
					Name="Release|x64"
					>
					<Tool
						Name="VCCLCompilerTool"
						UsePrecompiledHeader="1"
						WarningLevel="4"
					/>
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			>
			<File
				RelativePath=".\stdafx.h"
				>
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		</Filter>
		<Filter
			Name="Resource Files"
			Filter="rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav"
			UniqueIdentifier="{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}"
			>
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	</Files>
	<Globals>
	</Globals>
</VisualStudioProject>

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Web04 | 2.8.141220.1 | Last Updated 22 Mar 2012
Article Copyright 2012 by Karpov Andrey
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