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[DllImport("user32.dll")]
static extern IntPtr LoadIcon(IntPtr hInstance, IntPtr lpIconName);
[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
static extern IntPtr LoadImage(IntPtr hinst, string lpszName, uint uType,
int cxDesired, int cyDesired, uint fuLoad);
相关使用参考代码:
namespace ITLN.Utils.GUI {
public static class AuxiliaryGUIIcon {
[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
private static extern IntPtr LoadImage(IntPtr hinst, string lpszName, uint uType,
int cxDesired, int cyDesired, uint fuLoad);
[DllImport("user32.dll", SetLastError = true)]
private static extern int DestroyIcon(IntPtr hIcon);
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
private static extern IntPtr LoadLibraryEx(string lpFileName, IntPtr hFile, LoadLibraryFlags dwFlags);
private enum LoadLibraryFlags : uint {
DONT_RESOLVE_DLL_REFERENCES = 0x00000001,
LOAD_IGNORE_CODE_AUTHZ_LEVEL = 0x00000010,
LOAD_LIBRARY_AS_DATAFILE = 0x00000002,
LOAD_LIBRARY_AS_DATAFILE_EXCLUSIVE = 0x00000040,
LOAD_LIBRARY_AS_IMAGE_RESOURCE = 0x00000020,
LOAD_WITH_ALTERED_SEARCH_PATH = 0x00000008
}
/// <summary>
/// Returns an icon of given size.
/// </summary>
/// <param name="path">Path to a file (.exe/.dll) that contains the icons.
/// Skip it or use <c>null</c> to use current application's file.</param>
/// <param name="resId">Name of the resource icon that should be loaded.
/// Skip it to use the default <c>#32512</c> (value of <c>IDI_APPLICATION</c>) to use
/// the application's icon.</param>
/// <param name="size">Size of the icon to load. If there is no such size available, a larger or smaller
/// sized-icon is scaled.</param>
/// <returns>List of all icons.</returns>
public static Icon GetIconFromExe(string path = null, string resId = "#32512", int size = 32) {
// load module
IntPtr h;
if (path == null)
h = Marshal.GetHINSTANCE(Assembly.GetEntryAssembly().GetModules()[0]);
else {
h = LoadLibraryEx(path, IntPtr.Zero, LoadLibraryFlags.LOAD_LIBRARY_AS_DATAFILE);
if (h == IntPtr.Zero)
return null;
}
// 1 is IMAGE_ICON
IntPtr ptr = LoadImage(h, resId, 1, size, size, 0);
if (ptr != IntPtr.Zero) {
try {
Icon icon = (Icon)Icon.FromHandle(ptr).Clone();
return icon;
} finally {
DestroyIcon(ptr);
}
}
return null;
}
}
}