我需要从EXE中提取所有图标并将它们保存为磁盘文件,但我无法使用最简单的解决方案(
ExtractIconEx),因为我需要以保留大尺寸图标的方式提取ICO文件,即使代码运行在运行Windows XP的系统上.我稍后会使用其他代码提取想要的图标(128×128和其他vista大小图标),但我需要一种方法来提取所有图标,包括它们在EXE中存在的所有资源,无论我的代码是否运行PC on正在运行XP,Vista或Win7.
到目前为止,我知道图标在RT_GROUP_ICONS.
我知道有些人之前必须在Delphi中这样做,因为像IcoFX和resource-explorer这样的实用程序似乎已经这样做了.我曾经记得看到一个完全开源的Delphi工具可以做到这一点,但它是在几年前.
重述我使用ExtractIconEx的问题 – 它不会访问整个.ico文件,它只会提取支持的图标资源格式,这是平台支持的单一分辨率(大小).因此,在XP上,它将提取32×32或48×48图标,但不提取Vista格式的128×128图标.
更新：这是已接受答案的修改版本,解决了我未来的担忧.如果我们调用的函数以某种方式在未来的Windows版本中从User32.dll中消失,我希望它更优雅地失败,而不是加载我的整个应用程序.
unit ExtractIconUtils;
interface
uses Graphics,Forms,Windows;
//----------------------------------------------------------------------------
// ExtractIcons
// Call "private" MS Api to extract Icon file. This calls a publically
// documented function marked as deprecated in the MSDN documentation.
// It was no doubt Not Originally Intended to be documented,or publically
// accessed,but it provides functionality that its hard to live without.
// It exists on Windows 2000,XP,Vista,and Windows7,but might not exist
// in some future Windows version (released after year 2011).
//
// uses global hUserDll : THandle;
//----------------------------------------------------------------------------
function ExtractIcons(exeFilename,icoOutFileName:String;icoSize:Integer):Boolean;
var
hUserDll : THandle;
implementation
function ExtractIcons(exeFilename,icoOutFileName:String;icoSize:Integer):Boolean;
const
{$ifdef UNICODE}
ExtractProcName='PrivateExtractIconsW';
{$else}
ExtractProcName='PrivateExtractIconsA';
{$endif}
type
TExtractFunc = function(lpszFile: PChar; nIconIndex,cxIcon,cyIcon: integer; phicon: PHANDLE; piconid: PDWORD; nicon,flags: DWORD): DWORD; stdcall;
var
hIcon : THandle;
nIconId : DWORD;
Icon : TIcon;
PrivateExtractIcons:TExtractFunc;
begin
result := false;
if (hUserDll<4) then begin
hUserDll := LoadLibrary('user32.dll');
if (hUserDll<4) then exit;
end;
{ PrivateExtractIcons:
MSDN documentation says that this function could go away in a future windows
version,so we must try to load it,and if it fails,return false,rather than
doing a static DLL import.
}
PrivateExtractIcons := GetProcAddress(hUserDll,ExtractProcName);
if not Assigned(PrivateExtractIcons) then exit;
//extract a icoSize x icoSize icon where icoSize is one of 256,128,64,48,32,16
if PrivateExtractIcons ( PWideChar(exeFilename),icoSize,@hIcon,@nIconId,1,LR_LOADFROMFILE) <>0 then
try
Icon:=TIcon.Create;
try
Icon.Handle:=hIcon;
Icon.SaveToFile(icoOutFileName);
result := true;
finally
Icon.Free;
end;
finally
DestroyIcon (hIcon);
end;
end ;
initialization
// none
finalization
if (hUserDll>4) then
FreeLibrary(hUserDll);
end.
解决方法
PrivateExtractIcons功能可以帮到你.您可以指定要提取的图标的大小：
{$IFDEF UNICODE}
function PrivateExtractIcons(lpszFile: PChar; nIconIndex,flags: DWORD): DWORD; stdcall ; external 'user32.dll' name 'PrivateExtractIconsW';
{$ELSE}
function PrivateExtractIcons(lpszFile: PChar; nIconIndex,flags: DWORD): DWORD; stdcall ; external 'user32.dll' name 'PrivateExtractIconsA';
{$ENDIF}
procedure TMainForm.Button1Click(Sender: TObject);
var
hIcon : THandle;
nIconId : DWORD;
Icon : TIcon;
begin
//Extract a 128x128 icon
if PrivateExtractIcons ('C:\Users\Public\Documents\RAD Studio\Projects\2010\Aero Colorizer\AeroColorizer.exe',LR_LOADFROMFILE) <>0 then
try
Icon:=TIcon.Create;
try
Icon.Handle:=hIcon;
Icon.SaveToFile(ExtractFilePath(ParamStr(0))+'Aicon.ico');
finally
Icon.Free;
end;
finally
DestroyIcon (hIcon);
end;
end ;