UnpackDDElParam function (dde.h)

Article
02/22/2024

Unpacks a Dynamic Data Exchange (DDE)lParam value received from a posted DDE message.

Syntax

BOOL UnpackDDElParam(
  [in]  UINT      msg,
  [in]  LPARAM    lParam,
  [out] PUINT_PTR puiLo,
  [out] PUINT_PTR puiHi
);

Parameters

[in] msg

Type: UINT

The posted DDE message.

[in] lParam

Type: LPARAM

The lParam parameter of the posted DDE message that was received. The application must free the memory object specified by the lParam parameter by calling the FreeDDElParam function.

[out] puiLo

Type: PUINT_PTR

A pointer to a variable that receives the low-order word of lParam.

[out] puiHi

Type: PUINT_PTR

A pointer to a variable that receives the high-order word of lParam.

Return value

Type: BOOL

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero.

Remarks

PackDDElParam eases the porting of 16-bit DDE applications to 32-bit DDE applications.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	dde.h (include Windows.h)
Library	User32.lib
DLL	User32.dll
API set	ext-ms-win-ntuser-misc-l1-1-0 (introduced in Windows 8)