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OPENASINFO structure (shlobj_core.h)

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Stores information for the SHOpenWithDialog function.

Syntax

typedef struct _openasinfo {
  LPCWSTR            pcszFile;
  LPCWSTR            pcszClass;
  OPEN_AS_INFO_FLAGS oaifInFlags;
} OPENASINFO, *POPENASINFO;

Members

pcszFile

Type: LPCWSTR

A pointer to the file name.

pcszClass

Type: LPCWSTR

A pointer to the file type description. Set this parameter to NULL to use the file name extension of pcszFile.

oaifInFlags

Type: OPEN_AS_INFO_FLAGS

The characteristics of the SHOpenWithDialog dialog box. One or more of the following values.

OAIF_ALLOW_REGISTRATION (0x00000001)

Enable the "always use this program" checkbox. If not passed, it will be disabled.

OAIF_REGISTER_EXT (0x00000002)

Do the registration after the user hits the OK button.

OAIF_EXEC (0x00000004)

Execute file after registering.

OAIF_FORCE_REGISTRATION (0x00000008)

Force the Always use this program checkbox to be checked. Typically, you won't use the OAIF_ALLOW_REGISTRATION flag when you pass this value.

OAIF_HIDE_REGISTRATION (0x00000020)

Introduced in Windows Vista. Hide the Always use this program checkbox. If this flag is specified, the OAIF_ALLOW_REGISTRATION and OAIF_FORCE_REGISTRATION flags will be ignored.

OAIF_URL_PROTOCOL (0x00000040)

Introduced in Windows Vista. The value for the extension that is passed is actually a protocol, so the Open With dialog box should show applications that are registered as capable of handling that protocol.

OAIF_FILE_IS_URI (0x00000080)

Introduced in Windows 8. The location pointed to by the pcszFile parameter is given as a URI.

Remarks

Starting in Windows 10, the OAIF_ALLOW_REGISTRATION, OAIF_FORCE_REGISTRATION, and OAIF_HIDE_REGISTRATION flags will be ignored by SHOpenWithDialog. The Open With dialog box can no longer be used to change the default program used to open a file extension. You can only use SHOpenWithDialog to open a single file.

Requirements

Requirement Value
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2008 [desktop apps only]
Header shlobj_core.h (include Shlobj.h)