PackDDElParam function (dde.h)

Article
02/22/2024

Packs a Dynamic Data Exchange (DDE) lParam value into an internal structure used for sharing DDE data between processes.

Syntax

LPARAM PackDDElParam(
  [in] UINT     msg,
  [in] UINT_PTR uiLo,
  [in] UINT_PTR uiHi
);

Parameters

[in] msg

Type: UINT

The DDE message to be posted.

[in] uiLo

Type: UINT_PTR

A value that corresponds to the 16-bit Windows low-order word of an lParam parameter for the DDE message being posted.

[in] uiHi

Type: UINT_PTR

A value that corresponds to the 16-bit Windows high-order word of an lParam parameter for the DDE message being posted.

Return value

Type: LPARAM

The return value is the lParam value.

Remarks

The return value must be posted as the lParam parameter of a DDE message; it must not be used for any other purpose. After the application posts a return value, it need not perform any action to dispose of the lParam parameter.

An application should call this function only for posted DDE messages.

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)