OleQueryCreateFromData

Checks whether a data object has one of the formats that would allow it to become an embedded object through a call to either the OleCreateFromData or OleCreateStaticFromData function.

STDAPI OleQueryCreateFromData(

IDataObject * pSrcDataObject	//Points to the data transfer object to be queried
);

Parameter

pSrcDataObject

Points to the data transfer object to be queried.

Return Values

S_OK

Indicates formats that support embedded-object creation are present.

S_FALSE

Indicates no formats are present that support either embedded- or static-object creation.

OLE_S_STATIC

Indicates formats that support static-object creation are present.

Comments

When an application retrieves a data transfer object through a call to the OleGetClipboard function, the application should call OleQueryCreateFromData as part of the process of deciding to enable or disable the Edit/Paste or Edit/Paste Special... commands. It tests for the presence of the following formats in the data object:

CF_EMBEDDEDOBJECT
CF_EMBEDSOURCE
cfFileName
CF_METAFILEPICT
CF_DIB
CF_BITMAP

Determining that the data object has one of these formats does not absolutely guarantee that the object creation will succeed, but is intended to help the process.

If OleQueryCreateFromData finds one of the CF_METAFILEPICT, CF_BITMAP, or CF_DIB formats and none of the other formats, it returns OLE_S_STATIC, indicating that you should call the OleCreateStaticFromData function to create the embedded object.

If OleQueryCreateFromData finds one of the other formats (CF_EMBEDDEDOBJECT, CF_EMBEDSOURCE, or cfFileName), even in combination with the static formats, it returns S_OK, indicating that you should call the OleCreateFromData function to create the embedded object.

See Also

OleCreateFromData, OleCreateStaticFromData, OleQueryLinkFromData

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